تست کوپر یک معیار قدیمی و پرسابقه بینالمللی است که از آن برای سنجش آمادگیجسمانی دوندگان استفاده میشود.
تستی ساده (12 دقیقه تا جایی که میتوانید، بدوید) که میتواند اندازهگیری دقیقی از سطح آمادگی جسمانی یک دونده و تخمین خوبی از VO₂max او بدهد.
بسیاری از ورزشکاران از تست کوپر به عنوان معیاری برای دویدن خود استفاده میکنند؛ زیرا بعد از یک بار انجام دادن این تست برنامه تمرینی خود را بر اساس آن تنظیم میکنند تا رکورد زمانی خود را بهبود ببخشند.
در این مقاله قصد داریم به موارد زیر بپردازیم:
تاریخچه تست کوپر
رابطه بین تست کوپر و VO₂max
نحوه انجام تست کوپر (به همراه نکات)
تفسیر نتایج تست شما
جایگزینهای تست کوپر (سایر تستهای آمادگی جسمانی)
آمادهاید؟
تست کوپر چیست؟
تست کوپر یک تست آمادگی جسمانی است که برای تخمین ظرفیت هوازی یا VO₂max افراد استفاده میشود.
این تست توسط کنت اچ. کوپر (Kenneth H. Cooper) در سال 1968 برای ارتش ایالات متحده طراحی شد و از آن زمان تاکنون توسط مربیان متعددی در رشتههای مختلف ورزشی استفاده شده است.
عملکرد مؤثر سیستم قلبی عروقی یک ورزشکار عاملی کلیدی در پیشرفت اوست. در برخی منابع، توانایی تأمین مداوم سطح کافی از اکسیژن برای عضلات، به عنوان ظرفیت هوازی شناخته میشود.
یکی از پرکاربردترین اصطلاحات که به ظرفیت هوازی ورزشکاران اشاره دارد، VO₂max است.
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VO₂max چیست؟
حداکثر میزان مصرف اکسیژن که در طول تمریناتی با افزایش تدریجی فشار (incremental exercise) اندازهگیری میشود به عنوان VO₂max تعریف میشود و نشان میدهد که یک فرد در حین ورزش چقدر از اکسیژن به طور بهینه استفاده میکند.
تست دقیق VO₂max معمولا نیاز به دسترسی به آزمایشگاه دارد و در نتیجه میتواند هزینه بر باشد، اما چند تست هوازی وجود دارد که میتوان از آنها برای پیشبینی مقدار VO₂max استفاده کرد؛ تست کوپر یکی از پرکاربردترین آن تستها است.
محبوبیت این تست به دلیل سادگی نحوه انجام آن با استفاده از حداقل امکانات است، چون شما میتوانید خودتان آن را انجام دهید و تفسیر نتایج تست نسبتا ساده است.
واحدهای سنجش مورد استفاده در هنگام ارائه مقادیر، لیتر O2 در دقیقه (لیتر بر دقیقه) یا تقسیم آن بر وزن بدن برای بدست آوردن مقدار متناسب با وزن بدن یک فرد (میلی لیتر بر کیلوگرم بر دقیقه) است.
براساس مطالعهای که توسط ویلمور و کستیل (Wilmore and Costill) انجام شده است، مقدار معمول VO₂max برای Men جوان آموزش ندیده حدود ۳.۵ لیتر در دقیقه یا 45 ml.kg-1.min-1 و معادل آن برای Womenحدود ۲.۰ لیتر در دقیقه یا 38 ml.kg-1.min-1 است.
مقدار VO₂max در سطح بسیار حرفهای برای هر ورزش متفاوت است.
جالب اینجاست که بالاترین مقادیر ثبت شده مربوط به اسکیبازان کراس کانتری است و دوچرخه سواران و ورزشکاران سطح بالا نیز مقادیری را ثبت میکنند که معمولا از 80 ml.kg-1.min-1 و گاهی از 90 ml.kg-1.min-1 فراتر میرود.
ورزشکاران استقامتی زن کلاس جهانی مقدار بیش از 70 ml.kg-1.min-1 را ثبت کردهاند.
جدول زیر تعدادی از این مقادیر را به همراه ورزشهای مربوط به آنها نشان میدهد:
VO₂max (لیتر/کیلوگرم/دقیقه)
ورزشکار
Sex
رشته ورزشی
96.0
Espen Harald Bjerke
Male
اسکی کراس-کانتری
96.0
Bjorn Daehlie
Male
اسکی کراس-کانتری
92.5
Greg LeMond
Male
دوچرخهسواری
85.0
Dave Bedford
Male
دونده 10K
85.0
John Ngugi
Male
دونده کراس-کانتری
84.6
Chris Froome
Male
دوچرخهسواری
84.4
Steve Prefontaine
Male
دونده 10K
73.5
Greta Waitz
Female
دونده ماراتن
71.2
Ingrid Kristiansen
Female
دونده ماراتن
چگونه تست کوپر را انجام دهیم؟
انجام این تست نسبتا آسان است، اما باید موارد زیر را در نظر گرفت:
هدف از تست کوپر، دویدن و طی کردن بیشترین مسافت ممکن در ۱۲ دقیقه است.
نکاتی برای اجرای تست کوپر:
گرم کردن: قبل از شروع تست، حتما ۲۰ تا ۳۰ دقیقه خود را گرم کنید، شامل دویدن سبک و استراید برای آماده کردن بدن.
Route: این تست در حالت ایدهآل باید بر روی یک مسیر دوی استاندارد ۴۰۰ متری انجام شود، یا اینکه (با استفاده از GPS watch) مسیری مسطح پیدا کنید که دقیقا به همان طول اندازهگیری شده باشد.
نشانههای تصویری: یک نشان بصری (یک کلهقندی یا یک بطری آب) را در نقطه ۲۰۰ متری کناره مسیر قرار دهید، تا به پِیسینگ و تعیین مسافت کلی که میدوید کمک کند.
زمان بندی: اگر تنهایی تست را انجام میدهید، میتوانید از قابلیت شمارش معکوس گوشی خود استفاده کنید و آن را روی 12 دقیقه ست کنید. اینگونه میتوانید بر روی شمارش تعداد قدمها تمرکز کنید و وقتی بوق ساعت به صدا درآمد آزمایش را متوقف کنید.
همچنین، اگر کسی را دارید که در انجام تست کمکتان کند، میتوانید همه چیز را به او بسپارید.
نحوه محاسبه نتایج تست کوپر 12 دقیقهای
با استفاده از فرمولهای زیر میتوانید پس از اتمام تست، VO₂max تخمینی خود را محاسبه کنید.
بر اساس کیلومتر: VO₂max = (22.4 × مسافتی که طی کردین به کیلومتر) – 11.3
براساس مایل: VO₂max = (36 × مسافتی که طی کردین به مایل) – 11.3
برای مثال فرض کنید 3200 متر دویدهاید. VO₂max حدودی شما برابر با 60.3 = 11.3 – (3.2 × 22.4) خواهد بود.
بعد میتوانید نتیجه تست خود را با متوسط مقدار گروه همسال و همجنسیت خود مقایسه کنید.
برای انجام این مقایسه میتوانید از مسافتی که دویدید هم استفاده کنید.
نتایج تست کوپر برای مردان (به متر)
سن
Excellent
بالای متوسط
متوسط
پایین متوسط
Poor
مرد 20-29
> 2800m
2400 – 2800m
2200 – 2399m
1600 – 2199m
< 1600m
مرد 30-39
> 2700m
2300 – 2700m
1900 – 2299m
1500 – 1999m
< 1500m
مرد 40-49
> 2500m
2100 – 2500m
1700 – 2099m
1400 – 1699m
< 1400m
مرد 50+
> 2400m
2000 – 2400m
1600 – 1999m
1300 – 1599m
< 1300m
نتایج تست کوپر برای زنان (به متر)
سن
Excellent
بالای متوسط
متوسط
پایین متوسط
Poor
زن 20-29
> 2700m
2200 – 2700m
1800 – 2199m
1500 – 1799m
< 1500m
زن 30-39
> 2500m
2000 – 2500m
1700 – 1999m
1400 – 1699m
< 1400m
زن 40-49
> 2300m
1900 – 2300m
1500 – 1899m
1200 – 1499m
< 1200m
زن 50+
> 2200m
1700 – 2200m
1400 – 1699m
1100 – 1399m
< 1100m
چگونه تمرینهای خود را براساس نتیجه تست کوپر برنامهریزی کنیم؟
به طور کلی، این تست را میتوان در هر فصل از سال انجام داد، اما اصولا شروع فصل کراس کانتری (شهریور- مهر در نیمکره شمالی) زمان خوبی برای انجام آن است.
این کار به ورزشکار و مربی اجازه میدهد تا از نتیجه تست به عنوان نشانگر یا معیار آمادگی فعلی استفاده کرده و آنها را در بهتر کردن برنامه تمرینی مناسب راهنمایی کند.
پس از تست، سرعت خود را در هر ۴۰۰ متر محاسبه کنید. برای مثال، اگر در 12 دقیقه، ۳۲۰۰ متر دویده اید شما 400 متر را در 1.5 دقیقه طی کردهاید.
حالا برای یک هفته، براساس این نتیجه میتوان تمرین را به شکل زیر برنامهریزی کرد:
سه برابر مسیر طی شده در تست را در ۴۵ دقیقه بدوید. برای مثال، 3.2 کیلومتر دویدن در مدت زمان تست، یعنی 9.6 کیلومتر در 45 دقیقه بدوید.
3 ست 2K با پیسی که 400 متر را دویدهاید با 90 ثانیه استراحت بین ستها. که در این مثال یعنی 3 ست 2 کیلومتری دویدن در حداقل 7.30 دقیقه با 90 ثانیه استراحت.
چند ست 200 متری را به اندازه 8 ثانیه سریعتر از پیس 400 متر بدوید. که در این مثال، 400 متر در 1.5 دقیقه دویدن، نصف آن معادل 45 ثانیه که منهای 8 ثانیه یعنی 37 ثانیه زمان برای 200 متر.
میتوانید از 8 ست 200 متری شروع کنید و طی مدت 2 ماه به 16 ست برسید.
به طور خلاصه، بهترین راه برای استفاده بهینه از تست، استفاده از یک رویکرد منطقی و ساختارمند است. علاوه بر این، باید کمی تمرینات خود را پیشرفت دهید و افزایش تدریجی ۱۰ درصدی در یک دوره ۲ ماهه کافی خواهد بود.
جایگزینهای تست کوپر – تستهای دیگری که با آنها میتوانید آمادگی جسمانی خود را ارزیابی کنید
تستهای محبوب دیگری نیز وجود دارند که برای اندازهگیری ظرفیت هوازی استفاده میشوند و جایگزین خوبی برای تست کوپر هستند.
البته لازم به ذکر است که شما باید به تجهیزات بیشتری دسترسی داشته باشید، از دیگران کمک بگیرید و به طور بالقوه باید به امکانات ورزشی باشگاهی خاصی دسترسی داشته باشید.
تست بلیپ (The Bleep Test)
شاید تست شاتل ۲۰ متری یا همان تست بلیپ، برای شما آشنا باشد. در این تست لازم است ورزشکار دوهای شاتل ۲۰ متری را پشت سر هم بدود و قبل از به صدا درآمدن بوق بعدی به انتهای دیگر خط ۲۰ متری برسد.
ابتدا سرعت بسیار آهسته است اما به تدریج در هر دقیقه افزایش مییابد و زمان بین بوقها کم میشود.
اگر شرکت کننده نتواند قبل از بوق به خط برسد، حذف میشود. این تست نیاز به دسترسی به فایل صوتی تست بلیپ دارد.
تست 15 دقیقهای باک (Minutes Balke Test 15)
یکی دیگر از تست های مورد علاقه بسیاری از مربیان دو میدانی، تست ۱۵ دقیقهای باک است. این نام از طراح این تست برونو باک گرفته شده و بسیار شبیه به تست کوپر است.
این تست باید در پیست دو میدانی یا در مسیری صاف و مشخص انجام شود و شرکتکننده باید در 15 دقیقه همان اندازه مسیر که در تست کوپر گفته شد را بدود.
تردمیل استرند (Astrand Treadmill)
پر – اولاف استرند نامی شناخته شده در دنیای فیزیولوژی است و تست تردمیل او یکی از پرکاربردترین و مورد استنادترین دستاوردهای اوست.
این تست شامل حفظ سرعتی ثابت هنگام دویدن و افزایش تدریجی ۲.۵ درصدی در هر دو دقیقه است، تا زمانی که شرکت کننده به نقطه خستگی برسد.
به یاد داشته باشید که هر تستی را که انتخاب میکنید، مهمترین نکته آن تست این است که در صورت تکرار بعد از ۱۲ هفته، شما باید به دنبال بهبود 5 تا 10 درصد مسافتی که میدوید باشید.
این نشان میدهد که (به جز آسیبها و وقفههای اجتناب ناپذیر) تمرینات شما به خوبی ساختاربندی شده است و شما از پِیسهای مناسب با هدف بهبود VO₂max خود استفاده کردهاید.
همه اینها به کنار، یکی از مشهورترین نقل قولهای فرانک هورویل (Frank Horwill) این بود: «کسی که همیشه یک مدل تمرین میکند، تا آخر همانطور میماند».
VO2 Max عددی است که تناسب قلبی تنفسی شما را توصیف میکند
عدد واحدی که عملکرد مستقل و همچنین عملکرد همزمان قلب، ریهها، سیستم گردش خون و سلولهای ماهیچهای شما را نشان میدهد و عجیب نیست که VO2 Max شما به سلامتی، عملکرد و طول عمر مرتبط است.
عددی واحد که قلب، ریهها، سیستم گردش خون و سلولهای ماهیچهای شما را در بر میگیرد که همگی به طور مستقل و با هم کار میکنند و تعجب آور نیست که VO2 Max شما به سلامتی، عملکرد و طول عمر مرتبط است.
At the same time, many people find VO2 max difficult to understand on their Garmin smartwatch. Why? Maybe mixing letters, numbers and abbreviations together makes things look scary and complicated. Let’s skip past that problem for a moment. If you are really interested in fitness, then you will be fine with a funny name.
And in case you were wondering, it is pronounced vee oh two max.
Ask a physiologist about VO2 max and they will explain that it is the maximum volume of oxygen your body can import, transport and utilize in a single minute during intense physical activity. If that rings a bell, then great. You’ve got it and might be ready to scroll down to the VO2 max charts below. There you can instantly see how your VO2 compares to other people of your same age and gender. Otherwise, stick around.
Why VO2 Max Matters
Exercise physiologists have studied how the human body uses oxygen for long time. And the history of VO2 max as a performance metric dates back over a hundred years. Scientists observed that people are always using some oxygen even at rest. Start moving around or exercising and your body starts to use more and more oxygen as the intensity increases.
Why does your body need oxygen? Oxygen is the magical ingredient that makes aerobic energy production possible. That means transforming the energy stored in macronutrients like carbohydrates and fats into fuel for your muscle cells. That is why VO2 max is sometimes referred to as your aerobic capacity. It is also why endurance athletes spend a lot of time working to improve their VO2 max.
To directly measure oxygen consumption, you need to wear a special mask together with a machine capable of analyzing the contents of your respiratory gases.
The goal is to measure how much oxygen is in the air you breath in compared to how much oxygen is in the air you exhale. The difference is how much oxygen your body is using.
VO2 max tests are typically performed in a laboratory and involve running on a treadmill. The speed of the treadmill increases gradually until you reach the intensity at which maximum oxygen consumption rate is achieved. It is quite a workout and should only be performed when healthy.
Compatible Garmin watches automatically estimate VO2 max during walking and running activities using a method developed by Firstbeat Analytics. Advanced analytics interpret combinations of heart rate and performance data to reveal your aerobic capacity. This means looking at how quickly you are walking or how fast you are running compared to how hard your body is working to keep up pace. The method can also be used for cycling if you happen to have a power meter mounted on your bike.
Understanding VO2 Max
The first thing to understand is that a higher VO2 max is generally better than a lower VO2 max. A higher VO2 max means that your body is better at taking oxygen from the air and delivering it to your muscles. The more oxygen your muscles can get, the more nutrients you can aerobically transform into the molecular fuel (ATP) that your muscles use to contract and perform. This is important because your aerobic metabolic pathways are by far your most efficient source of energy for your body.
Higher is better than lower, got it. But how high is high enough?
If you are a competitive marathon runner, triathlete, cyclist, or cross-country skier, then the answer is really, really high. Top endurance athletes practically dedicate their lives to improving their VO2 max.
For most people, however, a good VO2 max is understood in terms of so-called normal values. These are the ranges of VO2 max that researchers have identified in the general population. This is where things can get tricky. Similar VO2 max results can mean different things for different people.
A VO2 max of 40 can be excellent for one person, good for another and only poor for a third. What? The missing context here is that the first person is a 28-year-old woman, the second is a 42-year-old man and the last is a 20-year-old male student.
Making sense of VO2 max requires personal context. That is the challenge.
VO2 Max for Men vs. Women
Variation in physical performance between men and women mostly come down to differences in body composition. Research shows that men typically have more lean muscle mass than women. And women tend to naturally accumulate more fatty tissue. Where fat deposits accumulate on the body also varies between men and women. Men tend to store fat around the trunk and abdomen, and women storing more fat around the hips and thighs.
جایی که ذخایر چربی در بدن انباشته میشود نیز در بین مردان و زنان متفاوت است. بدن مردان تمایل به ذخیره چربی در اطراف میانتنه و شکم دارد در حالی که بدن زنان در اطراف باسن و رانها چربی بیشتری ذخیره میکند.
These natural differences in average body composition are important for understanding what your personal VO2 max means. Muscles use oxygen while fat is simply stored energy.
On average, men have higher VO2 max values than women. So for a man and woman with the same VO2 max, the woman will have a better fitness level compared to her peer group.
A top female endurance athlete will almost certainly have a much higher VO2 max than the average male. However, she will likely have a lower VO2 max compared to a top male endurance athlete.
What’s a Good VO2 Max for My Age?
Age is always a tough topic. It is not fun to think about, but our performance tends to get worse as we get older. As humans our peak fitness potential is usually around the age of 20. This is true for both men and women.
From there, fitness typically declines between 5%-20% per decade in healthy individuals between the ages of 20 and 65. Cardiorespiratory fitness losses can be managed through healthy lifestyle choices and regular physical activity.
Past the age of 70, fitness levels decline even more quickly.
Several factors contribute to age-related fitness declines. One is the fact that total body mass or weight tends to increase as we get older, but lean muscle mass decreases. Another is that our muscles work less efficiently. This affects the large muscles that power our movement and the heart.
As we get older, our hearts simply cannot beat as fast as when we were younger. The force with which the heart beats to push oxygenated blood to the muscles also decreases.
The good news about VO2 max and aging is that for the most part accelerated fitness declines resulting from sedentary lifestyles can be reversed. This means that with proper care you can improve your fitness and feel younger and more energetic in the process.
Typical VO2 Max Fitness Scores for Men by Age Group:
Male
مقدار
20 – 29
30 – 39
40 – 49
50 – 59
60 – 69
70 – 79
Superior
95
55.4
54
52.5
48.9
45.7
42.1
Excellent
80
51.1
48.3
46.4
43.4
39.5
36.7
Good
60
45.4
44
42.4
39.2
35.5
32.3
Fair
40
41.7
40.5
38.5
35.6
32.3
29.4
Poor
0 – 40
41.7 >
40.5 >
38.5 >
35.6 >
32.3 >
29.4 >
Typical VO2 Max Fitness Scores for Women by Age Group:
Female
مقدار
20 – 29
30 – 39
40 – 49
50 – 59
60 – 69
70 – 79
Superior
95
49.6
47.4
45.3
41.1
37.8
36.7
Excellent
80
43.9
42.4
39.7
36.7
33
30.9
Good
60
39.5
37.8
36.3
33
30
28.1
Fair
40
36.1
34.4
33
30.1
27.5
25.9
Poor
0 – 40
36.1 >
34.4 >
33 >
30.1 >
27.5 >
25.9 >
Data reprinted with permission from The Cooper Institute®. For more information, go to www.CooperInstitute.org.
What About My Weight?
Weight management and fitness topics often go together and for good reason. Both are good health indicators and both benefit from healthy lifestyles.
When you get your VO2 max from a smartwatch or fitness tracker, the number you see is what exercise scientists call your relative VO2 max.
This simply means that the number you see is how much oxygen you can use per kilogram of body weight in a single minute. That means that your body weight is already factored into the equation.
If you are curious about your absolute VO2 max, you can easily calculate it. Simply multiply the VO2 max shown on your watch by your body weight measured in kilograms.
مربی دو، تام کرگز، واقعیتی را درباره اصطلاحی که اغلب اشتباه فهمیده میشود، بیان میکند و نشان میدهد چگونه میتوان از تمرینات آستانه لاکتات (threshold training) برای بالاتر بردن سرعت استفاده کرد.
تمرینات آستانه لاکتات یکی از تمرینات پایه برای دوندگانی است که در تلاش برای دویدن مسافتهای 800 متر و فراتر از آن هستند.
آستانه لاکتات حدی است که اسید لاکتیک با سرعتی بیشتر از سرعت دفع آن در خون تولید و انباشته و منجر به خستگی میشود.
تمرینات آستانه لاکتات برای بالا بردن این حد طراحی شده است و شما را قادر میسازد تا برای مدت طولانیتری سریعتر بدوید.
هنگامی که ورزش میکنیم، گلوکز را برای تولید انرژی تجزیه میکنیم. لاکتات و یونهای هیدروژن به عنوان بخشی از این فرآیند تولید شده و وارد جریان خون میشوند.
در سرعتهای پایین، بدن شما لاکتات و یونهای هیدروژن (معروف به بافر) را به راحتی پاکسازی میکند و از لاکتات به عنوان منبع انرژی استفاده میکند. وقتی سختتر میدوید، لاکتات و یونهای هیدروژن در خون، از سطح پایه خود بیشتر میشوند – این آستانه لاکتات نامیده میشود.
Lactate is generally measured in millimoles per litre (mmol/L) and lactate threshold usually occurs around 2mmol/L.
اگر به افزایش شدت دویدن ادامه دهید، توانایی بدن برای پاک سازی و استفاده مجدد از لاکتات نمیتواند با سرعت تولید آن همگام شود – این نقطه آستانه لاکتات شماست.
از این نقطه به بعد، یونهای هیدروژن و لاکتات به سرعت در خون افزایش مییابند. افزایش یونهای هیدروژن سطح pH خون را کاهش میدهد و آن را اسیدیتر میکند.
این امر توانایی ماهیچهها برای انقباض را کاهش داده و سرعت شما را کم میکند. این نقطه اغلب در حدود ۴ میلی مول بر لیتر لاکتات رخ میدهد.
So while lactate itself does not cause fatigue, we can use it as a proxy measurement for the other changes taking place that do limit your performance.
چگونه نقطه آستانه لاکتات خود را تعیین کنیم؟
آزمایشهای مختلف فیزیولوژیکی و میدانی وجود دارند که میتوانند به تعیین نقطه آستانه لاکتات کمک کنند. این موارد شامل انجام یک سری تمرینات است که به تدریج شدت آن افزایش مییابد و در پایان هر تمرین به اندازه نوک سوزن از انگشت یا گوش، خون گرفته میشود.
با افزایش سطح لاکتات، نتایج آزمایشها میتوانند با سرعت، ضربان قلب (HR) و میزان تلاش درک شده مطابقت داده شوند تا آستانه لاکتات شما با دقت قابل قبولی برآورد شود. اما، این کار میتواند هزینه بر باشد.
بسیاری از ساعتهای ورزشی میتوانند نقطه آستانه لاکتات را تخمین بزنند، اما دقت چنین اندازهگیریهایی تنها در صورتی باید مورد اعتماد باشد که با نتایج روشهای دیگر همبستگی داشته باشد.
به عنوان مثال میتوانید خودتان تست ماکزیمم ضربان قلب را انجام دهید و سپس نقطه آستانه لاکتات خود را در محدوده ۸۶ تا ۹۰ درصد این رقم تخمین بزنید.
مسابقهای را بدوید که حدودا یک ساعت طول میکشد. در صورتی که آمادگی این را داشته باشید که با حداکثر توان خود و به بهترین شکل بدوید، میتوانید تخمین مناسبی از سرعت، ضربان قلب و تلاش درک شده برای استفاده در تمرینات آستانه لاکتات خود به دست آورید.
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با تکیه بر احساس هم میتوانید پیش بروید. احساس سختی کنترل شده، یک راه خوب برای پیدا کردن نقطه آستانه لاکتات است – نمره ۷ تا ۸ از ۱۰، یا سطحی که در آن هنوز میتوانید دو یا سه کلمه صحبت کنید.
Yes, it's less accurate, but it's a starting point and it gets you in the ballpark – sometimes we can be too caught up in the numbers, and not enough in the feel of the run.
تمرینات آستانه لاکتات تریشولدچگونه باعث بهبود عملکرد میشوند؟
بسیاری از مربیان، فیزیولوژیستها و ورزشکاران معتقدند که درست تمرین کردن، پایین، بالا و روی نقطه آستانه لاکتات بهترین راه برای بهبود آن است. مثالهای مشهور آن، پائولا رادکلیف و برادران نروژی اینگبریگسن هستند.
این محدوده شامل دویدن طیف وسیعی در پیسهای مختلف است که بین آستانه لاکتات شما (از حدود پیس ماراتن) تا کمی بالاتر از نقطه آستانه لاکتات (تا حدود پیس 10K) قرار میگیرد.
با این حال، برخی از مربیان و ورزشکاران از تمرینات مدل آستانه لاکتات به نفع مدلهای دیگر تمرین اجتناب میکنند.
ممکن است با مفهوم تمرینات دو بخشی (polarised training) آشنا باشید، که در آن اکثر حجم تمرین (یعنی حدود ۸۰ درصد) با شدت کم و ۲۰ درصد باقیمانده در آستانه لاکتات یا بالاتر از آن انجام میشود و از محدوده میانی که بیشتر تمرینات آستانه لاکتات میتواند در آن قرار گیرد، دور میشود.
آنچه برای شما مفید است باید بر اساس تاریخچه و شرایط تمرینی فردی شما باشد، اما من متوجه شدهام که تمرینات مبتنی بر آستانه لاکتات ترشولد (threshold-based training) به بسیاری از ورزشکارانی که در 12 سال گذشته مربیگری کردهام کمک کرده است.
It’s not a magic bullet, and it needs to be mixed with good recovery and a broader sensible training mix, but if you aren’t including threshold work in your sessions, you could be missing out on some iimportant development as a runner.
Is tempo pace the same as threshold pace?
اصطلاحات در دویدن میتوانند گیج کننده باشند. اگر به دنبال تفاوتهای پیس آستانه با تمپو هستید، متاسفانه پاسخ دقیقی برای آن وجود ندارد.
برای برخی از دوندگان و مربیان، دویدن تمپو به دو طولانیتر با شدت کمی کمتر اشاره دارد که ممکن است بتوانید در یک مسابقه، 2 تا 3 ساعت اینگونه بدوید (نزدیکتر به آستانه لاکتات).
برای برخی دیگر دویدن تمپو، دویدن با سرعتی کمی بیشتر از سرعت آستانه لاکتات، نزدیک به سرعت مسابقهای ۳۰ تا ۴۰ دقیقهایست و کسانی هستند که از دویدن تمپو و دویدن آستانه به جای یکدیگر استفاده میکنند.
گاهی اوقات، بهتر است منظورتان را واضح بگویید: برای مثال، با سرعتی بدوید که میتوانید برای 40 تا 60 دقیقه در یک مسابقه آن را حفظ کنید، با فلان ضربان قلب بدوید و غیره.
یا حتی میتوانید آن را سادهتر کنید – مثلا، سبک، استیدی (steady)، قوی، محکم.
Try these 3 threshold workouts
How do you do them then?
برای مدت بیشتری در نقطه آستانه لاکتات یا نزدیک به آن تمرین کنید.
What intensity?
Run at a pace you feel you could hold for 50 to 60 minutes in a race. Most runners’ heart rates would be at 86 to 90% of their maximum at this effort.
What volume?
If you’re just starting out or racing over shorter distances (1500m to 5K), then 15 to 25 minutes at this effort is enough.
برای تمرین نیمه ماراتن یا ماراتن، با نزدیک شدن به روز مسابقه، سعی کنید به ۳۰ تا ۵۰ دقیقه برسید .
۱/ تمرین در آستانه لاکتات
خوب گرم کنید و ۱۵ تا ۲۵ دقیقه دویدن در آستانه لاکتات را به آن اضافه کنید سپس خود را سرد کنید.
۲/تمرینهای اینتروال لاکتات ترشولد
سبک شروع کنید؛ آهسته، پیوسته و در بخشهای آستانهای بدوید. به عنوان مثال، ۱۵ دقیقه سبک، ۱۵ دقیقه استیدی (steady) و ۱۵ دقیقه دویدن در آستانه لاکتات.
۳ / تقسیم کردن جلسات آستانه لاکتات
تقسیم جلسات آستانه لاکتات به قسمتهای طولانی با ریکاوریهای کوتاه، سبک یا استیدی (steady) میتواند به شما این امکان را بدهد که در حالی که شدت تمرین خود را تحت کنترل دارید مدت زمانی را که برای تمرینات آستانه لاکتات صرف میکنید افزایش دهید یا کمی سریعتر بدوید.
به عنوان مثال ۶ تکرارِ ۵ دقیقهای با ریکاوری سبک ۶۰ ثانیهای یا ۳ تکرارِ ۱۰ تا ۱۵ دقیقه با ریکاوری سبک ۲ دقیقهای.
Knowing when you’re going hard and when you’re taking it easy is key.
Knowing when you’re going hard and when you’re taking it easy is key to effective 80 / 20 Dr Stephen Seiler of the University of Agder, Norway, is one of the world’s foremost exercise physiologists and recommends a ‘triangulation of methods’, using a combination of heart rate, perceived exertion and pacing for best results.
Heart rate
Heart-rate monitors are very accurate at measuring intensity. First, identify your lactate threshold, which is similar to the ventilatory threshold. You can find yours by undertaking a 30-minute time-trial run where, after a brief warm-up, you run as far as you can in 30 minutes. Take your average heart rate during the last 10 minutes as your lactate-threshold HR.
Below are five intensity zones based on lactate-threshold HR. You’ll note that these aren’t contiguous.
That’s due to a buffer between low and moderate and moderate and high. Avoid these ideally, as that’s the physiological no-man’s land. Ventilatory threshold falls at the bottom end of zone 3, so anything under that is low intensity; high intensity is zones 4 and 5.
Pros Good for maintaining effort level during low-intensity runs. Cons Not great for high intensity because of a phenomenon known as cardiac lag. Your heart can take up to 30 seconds to catch up to an increase in effort. The same when recovering.
Perceived exertion
Simply, this refers to how hard you feel you’re working during a session. To help you quantify this, many coaches will use a simple one-to-10 system, where one is extremely easy and 10 extremely hard.
Low-intensity corresponds
to a rating of 1 to 4; moderate, 5-6; and high, 7 to 10. Pros The simplest and, arguably, the most realistic indicator of the body’s current limits and state. Cons As intensity rises, your brain can overestimate exertion levels.
Pacing
Use the online pacing calculator at runnersworld.com/uk/pacecalculator. Input a time from a recent race or time trial and it calculates your target paces for different types of session.
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This includes ‘easy’, ‘long, ‘tempo’, ‘VO2 max’ and ‘speed’.
For the purposes of 80/20 training, easy and long are low; and VO2 max and speed are high.
For example, 40 mins for a 10K means easy is 4:57min/km and long 4:57-5:36min/km, while VO2 max is 3:43min/km and speed 3:26min/km. Pros Great for monitoring and controlling intensity in moderate and high-intensity runs. Cons Don’t fall into the pacing trap of going too hard every session.
Cr: https://www.runnersworld.com
The recent news that a six-year-old boy has completed a marathon in the US has sparked debate around what amount of running is safe for growing children. Here, soft-tissue therapist Anna Gardiner looks at the risks and provides advice for parents
I love that my girls (Layla, 11, and Jasmine, nine) run. It’s rewarding, involves minimal organisation and is something we can do together. It was also something that was a constant during the Covid lockdowns, left over from the ‘time before’.
Out went their clubs, walking to school two miles a day, school playtimes and tearing around the park with friends. Often during lockdown, the only time the girls exercised was the 2km a day they committed to.
But having seen children in my clinic suffering from overuse injuries, I worried whether increasing their running might be setting them up for injury.
What are the benefits of running for children?
Of course, before we worry about any potential harm that could come to young people from running, it’s important to consider the huge amount of good it can do them. The physical benefits of running and exercise for children are numerous and can last a lifetime. Recent studies suggest that, as well as improving cardiovascular health and warding off diseases like type 2 diabetes and conditions associated with excessive weight gain, weight-bearing exercise in early puberty is beneficial for long-term bone health.
Research has also shown that aerobic exercise can enhance brain plasticity (the brain’s ability to adapt and modify itself according to experiences and environment) and brain resilience (meaning the brain can better adapt to acute stress or trauma). Our hand-eye coordination, reaction speeds and the development of muscle fibres are established during childhood
The greater variety of physical activity carried out by children, research shows, the easier they find tasks and sports as adults.
Studies also support the link between exercise and positive mental health in children, with experts suggesting that running and exercise can help kids have a more positive outlook on life and help build their confidence.
My daughters have also learned that consistent training results in personal bests – the important life less on that hard work pays off.
Exercise can even help manage anxiety and uncertainty in a changing world. A study published in the journal Pediatrics found that increased physical activity could prevent and treat childhood depression and manage other conditions.
What risks does running pose for children and young adults?
Still, when my daughter reminded me that finally she would be able to ‘race’ parkrun by herself when it reopened in the summer, it made me consider how we could incorporate that into her life, with athletics and running clubs already accounting for three sessions a week. I often see children and adolescents in my clinic with what are essentially overuse injuries. Watching children and teenagers speeding around the 5K of our local parkrun, I wonder how often they’re running that sort of distance and pace. This is something to be mindful of at their ages.
As much as we want to get them active – particularly as Sport England found that, at the height of lockdown back in May 2020, 31% of the children interviewed were doing less than 30 minutes of activity a day – it’s important to remember that their bodies are still growing.
How do we gauge the balance between encouraging them to exercise to gain the physical and mental benefits running brings without overloading their growing bodies?
Overtraining burnout is a distinct possibility for children
Skeletal maturation happens over many years and is achieved when the growth plates have fused and adult bone shape and density have been attained,’ explains physiotherapist Claire Callaghan.
So repetitive stress on the growth plates when they’re soft and still growing could cause pain and swelling, bone ‘bumps’ or, worse, stress fractures.‘Teenagers are also undergoing hormonal changes and rapid growth, as well as changes in body shape and weight,’ says Callaghan.
These changes can affect the ability of the muscles and tendons to handle the load that impact activities place upon them, particularly where the tendons insert into the bone. Their bodies are already trying to adapt to normal growth changes, so they’re more vulnerable to further stresses.
As a result, adolescents, particularly active children, are prone to medial tibial stress syndrome shinsplintsPain in the anterior knee or heel (either unilateral or bilateral) is also often brought about by excessive running, jumping or quick changes in direction.
Then there are musculoskeletal issues such as Osgood-Schlatter and Sever’s disease. The most common and adolescent-specific, Osgood-Schlatter (sometimes called osteochondrosis), occurs at the patellar tendon insertion site at the tibial tuberosity – essentially at the top of the shin and below the kneecap. This is where your young runner’s quadriceps attach via the tendon to the growth plate at the top of the shin bone. Repeated traction and force caused by frequent high impact in this area can create microvascular tears and inflammation, which presents as pain, swelling and/or a bone prominence.
We don’t want to break our young athletes, but rather inspire them to love the sport
A review of Osgood-Schlatter data, published last year in the journal Current Opinion In Pediatrics, suggested that predisposing factors include the age of the child (12 to 15 for boys and eight to 12 for girls), sudden skeletal growth and poor flexibility of hamstrings and quadriceps.
Pain is usually a dull ache at the top of the knee during running, jumping, kneeling or squatting, which subsides between minutes and hours after the activity stops.
Former Olympic long-distance runner turned running coach Liz Yelling, who
was coached from an early age, had mild Osgood-Schlatter. She remembers how her coach used to ask his athletes to measure their height weekly to ensure training was modified during a growth spurt.
Treatments can range from rest (or at least modifying the inciting movement) or strength work, to ice or non-steroidal anti-inflammatory drugs. These should all be taken under the guidance of a professional. As Callaghan says, ‘If problems aren’t correctly diagnosed and treated, or if an adolescent pushes through pain, long-term issues can occur.’
Sever’s disease is also predominantly a young athlete’s condition (most common between the ages of nine and 12). It’s an inflammation caused by force and traction of the tendon at its insertion point at the calcaneus, or heel.
Contributory factors are an increase in, or excessive, running and jumping, weak ankle dorsiflexion, ill-fitting shoes and running on hard surfaces – all at a time when a child is having growth spurts of both skeletal and soft-tissue structure.
Treatment is similar – rest, ice and modification to training routines. But again, specialised guidance is strongly advised as it can be a recurring condition if left untreated.
‘It’s more important to look at load management and improving strength and conditioning if required,’ says sports podiatrist Matt Hart.
‘It’s not about footwear, but reducing load.’ Thats said, ‘shoes do need to fit well’, adds Callaghan, ‘as poor support can place too much force on growing bones’.
How to mitigate the risks
With children and adolescents more susceptible to these types of conditions, training smarter and making preventative, rather than reactive, changes are key. With all the benefits of running in youth and later life, we don’t want to discourage young runners. Fortunately, there are many things we can do to mitigate the risks.
1.Listen to your child and any complaints they may have of pain
It’s easy to brush off a child’s or adolescent’s complaints of discomfort or pain – if you’re a parent or carer who runs, you know first-hand about daily niggles. But it’s important to be alert to complaints, particularly if the discomfort is in the same place, either during an activity or after.
Keeping a pain diary – not to encourage histrionics, but to be alert to patterns – can be useful. Then, if a professional’s help is sought, you’re armed with useful information for them to be able to quickly diagnose and treat the issue.
If a child constantly appears to have niggles, then they may be trying to tell you that they need a break. Running through pain isn’t good for adults or children and we don’t want to establish bad running habits.
Yelling offers this advice: ‘We don’t want to break our young athletes, but rather inspire them to love the sport and continue to be happy, active adults.
2. Get help from an expert
If your child is becoming enthused by running and wants to run more frequently or competitively, then it’s ideal to have input from experts who can help nurture their running.
Sometimes, we’re not our offspring’s best role models. That can be a difficult pill to swallow, but they’re not mini adults and – although, aerobically, they’re capable of running further and longer – physically, they can’t do this to an extreme level without it being potentially detrimental to their musculoskeletal health over time.
With the popularity of ultrarunning, virtual challenges and a trend edging towards the challenge of running further not faster, training with a club or a coach can remind us that our kids are just starting out and have many years of running in them.
Coaches at running or athletic youth clubs have had specific training on fostering healthy running practices. They can incorporate running games into sessions, helping to develop agility, speed and strength, rather than just linear movement. They’re also able to enhance the social aspect of an essentially individual sport and demonstrate how running with people can provide great motivation and encourage healthy competition.
3. Keep a diary of your child's training and sporting activities
Overtraining burnout is a distinct possibility for children. Keeping a note of runs (and, indeed, other sports on a family calendar) for both yourself and your young runner is a great way of visualising the frequency and quality of training.
Sometimes, it takes all their activities being written down to take a step back and consider whether they’re taking on too much.
In my clinic, I’ve seen young athletes whose parents only start to realise the degree to which they’re pushing their bodies when I ask them to go through a couple of weeks’ worth of activities. If the calendar flags that they’re overdoing things, we can then take steps
to modify the training or look at active rest, recovery or a period of cross training.
Overtraining was particularly noticeable when children went back to schools and clubs after the lockdowns, and people threw themselves back into ‘normal’ life.
It was often overlooked that children were six months older, potentially in different stages of bone and muscle growth from where life was left off, and that going from minimal to maxed-out training doesn’t allow the body to adapt properly at any age, especially when still growing.
‘Children and teens aren’t “small adults” and can’t be treated as such,’ says Callaghan.
‘They need to gradually increase training so they don’t put too much pressure on growing joints and muscles.’
If a child constantly has niggles, then they may be trying to tell you that they need a break
4. Mix up their training
Mixing up their training miles to include a wide variety of surfaces is another sound strategy. Ideally, children would do most of their training on grass or at a track, because softer ground can reduce ground-reaction force.
Playing other sports or doing other activities is also really important at this age. My eldest prefers running above any other sport, but trains at an athletics club where she also does jumping and throwing events.
As is the case for adults, cross-training challenges children’s bodies in different ways, adding cardiovascular and musculoskeletal strength. Adapting soft tissue with different challenges also reduces the repetitive loads placed on the same joints, muscles and ligaments
5. Consider a personalised training plan
There are recommended running mileage suggestions for different childhood ages, but each child is an individual, and generalised recommendations don’t factor in the different speeds at which their bodies mature.
Plus, the two sexes have different biological maturation ages and are different in terms of hormones and musculoskeletal structures. So it’s key to look at the individual young runner, rather than set limits or targets based on generic advice.
‘As coaches, the athlete as a person should always come first,’ says Yelling. ‘We should focus on assisting optimal developmental processes, rather than focusing on results.’
6. Ensure your child is getting a healthy, balanced diet
It’s not all about training, though – diet and duvet time have roles to play. Ensuring children and adolescents eat a healthy, balanced diet – with a variety of food groups, plenty of fruit and veg, good protein sources and whole grains – is easier said than done
but it’s essential that, with growing bodies, they adequately fuel their runs and recovery. If too much is asked of soft tissue and bones without the essential ingredients for repair, sourced from food, bodies become fatigued and vulnerable to injuries.
7. ...and plenty of sleep
The importance of sleep in promoting recovery and repair from training is well documented. A recent study published in the British Journal Of Sports Medicine found that teenagers need eight to 10 hours of quality shut-eye per night.
Fitting in school work, after-school clubs, a social life and their running means kids often go to bed later than is ideal, so it’s important to notice when your child seems constantly fatigued and encourage them to take a session off and get an early night.
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How else can we encourage healthy habits in our children?
Tips and strategies to help ensure our kids are all right...
Make it fun. Tag, shuttle runs, relay races – they all develop fast- twitch fibres, encourage agility and build social relationships
Add strength/conditioning. Introduce circuits as part of drills and warm-ups. Just body weight with a little bit of everything.
. Try geocaching. A great way to go a little further on mixed terrain with plenty of natural walk/recovery breaks.
Run to feel. Encourage them not to push for times or pace in every session, but to listen to their bodies.
Check clothes and shoes fit well. Keep an eye on growth spurts and ease off on training a little if you notice one is underway.
Minimise pressure Remember, we want them to have a healthy lifelong love for running and exercise.
Red flags
Look for these warning signs that your young runner maybe overdoing it and in danger of burnout or injury:
Complaining of pain at the anterior knees, shins and heels
Inflammation or swelling
Moving stiffly or awkwardly in everyday life or when exercising
Feeling consistently tired
Feeling consistently tired
Pushing hard in every training session
Reluctance to train
Consistently disappointed with performance in sessions or races
دوندگان به الکترولیت نیاز دارند. نوشیدنیهای ورزشی وعده آبرسانی بهتر، گرفتگی عضلانی کمتر و پایین آمدن ریسک مصدومیت (رسیدن به بهداری) را میدهند. مزایای ادعا شده برای الکترولیتها به طرز مشکوکی خوب به نظر میرسند. با این حال، ارزش آن را دارد که این ادعاها را دقیقتر بررسی کنیم و ببینید شواهد چه میگویند.
الکترولیتها برای دویدن در مسافتهای طولانی و فصل تابستان ضروری هستند. برخی از دوندگان میزان تعریق بالایی دارند و میتواند در تمام طول سال از مزایای مکملهای الکترولیتی بهرهمند شوند.
سایر دوندگان فقط برای مسابقات تابستانی یا مسافتهای طولانی ممکن است به آنها نیاز داشته باشند. شما فقط محدود به Gatorade نیستید. گزینههای متعددی از محصولات هیدراتاسیون الکترولیتی در بازار موجود است.
الکترولیتها چه هستند و چرا برای دوندگان ضروری هستند؟
الکترولیتها مواد معدنی طبیعی هستند که در عرق و ادرار شما یافت میشوند و بدن از آنها برای هدایت بارهای الکتریکی استفاده میکند. الکترولیتها مسئول انقباض و شل کردن عضلات، تعادل مایعات و انتقالات عصبی بین مغز و عضلات هستند.
الکترولیتها عبارتند از مواد معدنی سدیم، کلرید، پتاسیم، منیزیم و کلسیم. جایگزینی همه این مواد معدنی مهم است. با این حال، سدیم مهمترین الکترولیتیست که باید در طول دویدن به سطح قبلی خود بازگردانده شود.
وظیفه حیاتی سدیم شامل تنظیم مایعات و الکترولیتها در بدن، از جمله در خون است. سدیم با هورمونهایی از جمله وازوپرسین (vasopressin – هورمون آنتیدیورتیک) و آلدوسترون (aldosterone) که تعادل مایعات را در کلیهها تنظیم میکند، تعامل دارد.
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سدیم همچنین از طریق تنظیم پمپاژ سدیم-پتاسیم ATP-ase (ایتیپاز طبقهای از آنزیمها هستند که باعث تسریع در تجزیه ATP به ADP و یون فسفات میشوند. این واکنش فسفاتزدایی منجر به آزاد شدن انرژی میشود که توسط آنزیم برای انجام واکنشهای شیمیایی که در حالت عادی اتفاق نمیافتند استفاده میشود) تکانههای عصبی و انقباض ماهیچهایِ سلولهای عضلانی را در وضعیت مناسب نگه میدارد.
پتاسیم همچنین به تعادل مایعات به ویژه مایعات داخل سلولی کمک میکند. پتاسیم همراه با سدیم، انتقالات عصبی به سلولهای عضلانی را ارتقا داده و بهبود میبخشد.
کلسیم و منیزیم در طی گلیکولیز (glycolysis – تبدیل کربوهیدراتها به ATP)، گلیکوژنولیز (glycogenolysis – تبدیل گلیکوژن ذخیره شده به گلوکز برای تولید انرژی) و چرخه اسید سیتریک (Krebs cycle) با آنزیمهای کلیدی تعامل دارند.
یونهای کلسیم در سلولهای عضلانی به عمل انقباض عضلانی کمک میکنند. منیزیم حرکت کلسیم را در سلولهای عضلانی در طول انقباض عضلانی تسهیل میکند.
برای فعالیتهای روزانه، غذاهای اورگانیک میتوانند الکترولیتهای لازم را فراهم کنند. با این حال، ورزشکاران استقامتی نیاز به الکترولیت بیشتری دارند، به ویژه در طول مسابقات با مسافت طولانی، دوهای طولانیمدت و تمرینات تابستانی.
هنگام دویدن به دلیل بیشتر عرق کردن و در نتیجه از دست دادن الکترولیت بیشتر این نیازها افزایش میابند. بنابراین الکترولیتها باید در حین دویدن از طریق مواردی که به راحتی قابل جذب هستند، مانند نوشیدنیهای ورزشی یا قرصهای نمک جایگزین شوند.
چرا الکترولیتها برای دوندگان ضروری هستند؟
به طور متوسط، اکثر دوندگان به طور کلی 770 میلی گرم سدیم در هر لیتر عرق از دست میدهند. میزان کاهش پتاسیم، کلسیم و منیزیم به ترتیب 195 میلی گرم در لیتر، 20 میلی گرم کلسیم در لیتر و 10 میلی گرم در لیتر است.
با این حال، این اعداد صرفا میانگین هستند. برخی از دوندگان مقدار کمی سدیم در عرق خود از دست میدهند، در حالی که برخی دیگر مقادیر قابل توجهی از دست میدهند.
یک مطالعه در سال 2017 در مجله اسکاندیناوی پزشکی و علم در ورزش (Scandinavian Journal of Medicine and Science in Sport)، سطح سدیم را در دوندگان باتجربه ماراتن اندازهگیری کرد. کسانی که املاح کمی در عرق خود از دست میدهند به طور متوسط 388 میلی گرم سدیم در لیتر عرق میکنند. گروه افراد معمولی به طور متوسط 1000 میلی گرم در لیتر از دست دادند.
در گروه با تعریق زیاد، از دست دادن سدیم به طور متوسط 1656 میلی گرم در لیتر بود که در برخی از افراد به 1922 میلی گرم در لیتر هم میرسید. (مانند بسیاری از مطالعات، حجم نمونه فقط ورزشکاران مرد را شامل می شود.)
بنابراین، میزان از دست دادن سدیم در دوندگان به طور قابل توجهی متفاوت است. نیازهای الکترولیتی فردی ممکن است متفاوت باشد. اغلب برای درک میزان تعریق خود، شما نیاز به آزمون، خطا و تجربه دارید.
قرار نیست شما این مواد را به طور کامل جایگزین کنید و نیازی هم به این کار ندارید. هدف نهایی تقریباً نیمی از این مقدار است (یعنی تقریباً 400 میلی گرم سدیم برای هر یک ساعت ورزش شدید). حتما باید حواستان باشد که در مصرف سدیم زیاده روی نکنید.
سدیم بیش از حد میتواند باعث تشنگی شدید و ناراحتی دستگاه گوارش شود. بنابراین، Nuun و Saltstick را همزمان مصرف نکنید. با این حال، ترکیب ژلها و Nuun یا Skratch برای اکثر دوندگان به خوبی کار میکند.
حتی اگر سطح سدیم شما به آستانه خطرناکی کاهش نیافته باشد هم، جایگزینی مجدد الکترولیتها میتواند برایتان مفید باشد. آب معمولی از طریق کاهش اسمولالیته پلاسما (plasma osmolality) میتواند دوباره تشنه شدن را مختل کند.
سدیم موجود در نوشیدنیهای ورزشی تشنگی را افزایش میدهد درنتیجه نیاز به مصرف مایعات در حین ورزش نیز بیشتر میشود.
الکترولیتها فقط برای افرادی که زیاد عرق میکنند نیستند
یک مطالعه مقطعی در سال 2011 در مجله تمرینات ورزشی (Athletic Training) نشان داد که اکثر دوندگان مسافت طولانی آب را به نوشیدنی ورزشی ترجیح دادند. برخی نیز به دلیل کالری شماری از نوشیدنیهای ورزشی اجتناب کردند.
تجربه عینی مربیگری این موضوع را تایید میکند؛ هم خودم و هم سایر مربیانی که میشناسم دیدهایم که ورزشکاران یا مصرف الکترولیت را فراموش کردهاند و یا عمداً از مصرف الکترولیت خودداری میکنند.
اما برای دویدن در مسافتهای طولانی، الکترولیتها هم برای عملکرد و هم برای سلامتی ضروری هستند. عدم تعادل جزئی الکترولیت میتواند باعث گرفتگی عضلات و کم آبی بدن شود؛ عدم تعادل شدید میتواند باعث تهوع، استفراغ، گیجی، سرگیجه و حتی تشنج ناشی از رقیق شدن خون (هیپوناترمی) شود.
باورهای غلط رایج معمولاً افرادی که زیاد عرق میکنند را با عدم تناسب اندام مرتبط میسازند. درست است که یک ورزشکار با اندام نامتناسب در سطوح پایینتر فعالیت بدنی بیشتر عرق میکند، اما میزان تعریق صرفاً یک فاکتور فردی است. برخی از دوندگان عملا حجم بیشتری عرق میکنند و نمک بیشتری را در عرق خود از دست میدهند، حتی اگر بسیار حرفهای باشند.
طبق یک مطالعه در سال 2016 در مجله انجمن بین المللی تغذیه ورزشی (Journal of the International Society of Sports Nutrition)، تقریباً 20 درصد از دوندگان غیرحرفهای ماراتن تعریق زیاد دارند – و هیچ ویژگی فردی یا تمرین قبلیای میزان تعریق فرد را نمیتواند پیشبینی کند.
حالا ارزش دارد بگوییم که شما بهتر است الکترولیت دریافت کنید، حتی اگر جزو افرادی که تعریق بالایی دارند نیستید. طبق مطالعهای در سال 2015 که در مجله پزشکی و علوم ورزشی اسکاندیناویی (Journal of Medicine and Science in Sports) منتشر شد، افرادی که زیاد عرق میکنند سطح سرمی (serum) کمتری از سدیم دارند.
هر دونده در صورتی که در طول مسابقه طولانیمدت بیش از حد هیدراته شوند و سدیم را جایگزین نکند، در معرض خطر هیپوناترمی قرار میگیرد. همانطور که در این مطالعه اشاره شد، افرادی که زیاد عرق میکنند باید بیشتر به مصرف سدیم در حین ورزش توجه داشته باشند.
از دست دادن الکترولیت و کاهش عملکرد
الکترولیتها به عملکرد صحیح ماهیچهها کمک میکنند. با این حال، مهم ترین تاثیر الکترولیتها بر عملکرد مربوط به هیدراتاسیون است. شواهد متعدد نشان میدهد که از دست دادن مایعات بیش از 2-4٪ وزن بدن میتواند عملکرد را مختل کند. هرچه از دست دادن مایعات بیشتر باشد، افت عملکرد شدیدتر خواهد بود. در کاهش 4 تا 7 درصد از وزن بدن از طریق تعریق، عملکرد هوازی به سرعت کاهش مییابد.
مقالهای در سال 2021 در Nutrients به تشریح به اثرات منفی کم آبی بدن (dehydration) بر عملکرد استقامتی میپردازد. با از دست رفتن حدود 2 درصد از وزن بدن، اقتصاد دویدن (running economy) شروع به زوال میکند.
کم آبی بدن خون را غلیظ میکند که در نتیجه آن نیازهای قلبی عروقی ورزش را افزایش میدهد. پمپاژ خروجی قلب کاهش مییابد، به این معنی که خون غنی از اکسیژن کمتری به ماهیچههای در حال کار میرسد. 4 تا 5 درصد از، از دست دادن آب بدن باعث کاهش VO2max میشود، به خصوص در هنگام ورزش در گرما.
همانطور که در بالا توضیح داده شد، الکترولیتها آبرسانی مجدد را در طول ورزش تقویت میکنند. اثر آنها بر اسمولالیته خون باعث تشنگی میشود که ورزشکار را به نوشیدن بیشتر سوق میدهد.
بسیاری از ورزشکاران طعم نوشیدنیهای الکترولیتی را ترجیح میدهند و تمایل بیشتری به نوشیدن آنها دارند. در مسابقات مسافت طولانی، الکترولیتها میتوانند به عنوان یک کمک ارگوژنیک (تقویت کننده عملکرد) عمل کنند.
یک مطالعه در سال 2016 در مجله پزشکی و علوم ورزشی اسکاندیناویی ورزشکاران سه گانه را در مسافت نیمه ماراتن، با گروه کنترل (که دارونما (placebos) مصرف کردند) و گروهی که قرصهای الکترولیت خوراکی مصرف کردند، مورد آزمایش قرار داد.
گروه الکترولیت به طور متوسط 26 دقیقه سریعتر از گروه کنترل به خط پایان رسیدند. این مقدار زمان قابل توجهی است!
آیا الکترولیتها از گرفتگی عضلانی در دوندگان جلوگیری میکنند؟
در حال حاضر شواهد در مورد الکترولیتها و گرفتگی عضلانی متفاوت است. یک مطالعه در سال 2021 در مجله انجمن بین المللی تغذیه ورزشی (Journal of the International Society of Sports Nutrition) به این نتیجه رسید که مصرف الکترولیت باعث کاهش بروز گرفتگی عضلات میشود.
محققان همچنین خاطرنشان کردند که مصرف آب معمولی در طول دویدن طولانی مدت در واقع احتمال گرفتگی عضلات را افزایش میدهد.
با این حال، مطالعهای در سال 2022 در مجله Strength and Conditioning Research هیچ ارتباطی بین سطح الکترولیت سرم (serum) در ورزشکارانی که گرفتگی عضلات را تجربه میکنند، نشان نداد.
هیپوناترمی (hyponatremia) و الکترولیتها برای دوندگان
هنگامی که در حین ورزش آب زیاد بدون سدیم کافی مصرف میکنید، حجم خون شما میتواند بسیار رقیق شود. این وضعیت هیپوناترمی نامیده میشود و نیاز به مراقبتهای پزشکی حرفهای و فوری دارد. علائم شامل تهوع، استفراغ، سرگیجه، گیجی، سردرد و خستگی شدید است.
هرچه این وضعیت طولانیتر باشد، در صورت عدم جبران سدیم، خطر هیپوناترمی بیشتر میشود.
با این حال، تعامل الکترولیتها و خطر هیپوناترمی همچنان مورد مطالعه قرار میگیرد. مطالعه ذکر شده در بالا در مورد میزان تعریق در دوی ماراتن به این نتیجه رسید که کاهش بیشتر سدیم در عرق باعث افزایش بروز هیپوناترمی نمیشود.
با این حال، همان دوندگان مصرف سدیم بیشتری را در طول نوشیدن اختیاری مایعات در طول مسابقه گزارش کردند. بنابراین، ما نمیدانیم که مصرف آب معمولی چگونه میتوانسته بر ریسک آنها تأثیر گذاشته باشد.
برای تجزیه و تحلیل عمیقتر الکترولیتها و هیپوناترمی، این مقاله مروری کامل بر تحقیقات اخیر ارائه میدهد. اگر شک دارید، الکترولیت مصرف کنید. حتی اگر به طور قطع ندانید که آیا از هیپوناترمی جلوگیری میکنند یا خیر، مزایای الکترولیتها از خطر احتمالی آن بیشتر است.
نحوه مصرف الکترولیتها
اگر کمتر از یک ساعت میدوید نیازی به مصرف الکترولیت ندارید. برای دویدن و مسابقات بین 1 تا 3 ساعت، لازم است میکس هیدراتاسیون یا قرص الکترولیت مصرف کنید.
برای مسابقات بیش از سه ساعت، مراقب مصرف کافی الکترولیت هم قبل و هم در حین مسابقه باشید. برخی تحقیقات نشان میدهد که دوندگان ماراتن مبتلا به هیپوناترمی ممکن است مسابقه را با کمبود جزئی الکترولیت شروع کنند.
بسیاری از دوندگان الکترولیت را حذف میکنند زیرا Gatorade معده آنها را اذیت میکند. با این حال، الکترولیتها نیستند که باعث ناراحتی دستگاه گوارش میشوند. برای برخی، بعضی قندهای خاص و رنگ و طعم دهندههای مصنوعی است که اذیت کننده است.
نوشیدن Gatorade یا Powerade در صورتی که برای شما مفید باشد، هیچ اشکالی ندارد. اگر متوجه شدید که Gatorade باعث ناراحتی دستگاه گوارش میشود، میتوانید یک گزینه جایگزین پیدا کنید و آن را در دو های تمرینی و روز مسابقه همراه خود داشته باشید. انواع مختلفی از نوشیدنیهای ورزشی و قرص نمک وجود دارد که میتوان از آنها برای الکترولیت استفاده کرد.
آب نارگیل در سالهای اخیر محبوبیت بیشتری پیدا کرده است. مطالعهای در سال 2017 در مجله بین المللی تغذیه ورزشی و متابولیسم ورزشی (International Journal of Sport Nutrition and Exercise Metabolism)، هیچ تفاوت قابل توجهی بین آب نارگیل با آب معمولی در هیدراتاسیون یا عملکرد time trial نشان نداد.
تنها تفاوتی که در یک مطالعه در سال 2012 در مجله بینالمللی انجمن تغذیه ورزشی (International Journal of the Society of Sports Nutrition) یافت شد این است که دوندگانی که آب نارگیل مصرف میکردند علائم بیشتری از ناراحتی دستگاه گوارش از جمله نفخ را گزارش کردند. طبق یک مطالعه در سال 2014 در فیزیولوژی کاربردی، تغذیه و متابولیسم (Applied Physiology, Nutrition, & Metabolism )، پتاسیم اضافی در آب نارگیل هیچ مزیت اضافی برای آبرسانی مجدد به همراه ندارد.
پتاسیم در مقایسه با سدیم به مقدار کمی در عرق از دست میرود. اگر آب نارگیل را به نوشیدنی ورزشی ترجیح میدهید، از آن استفاده کنید. با این حال، آب نارگیل نسبت به سایر نوشیدنیهای الکترولیتی برتری خاصی ندارد.
بیشتر نوشیدنیهای الکترولیتی که برای ورزش فرموله میشوند حاوی کربوهیدرات هستند. سدیم نقشی کلیدی در انتقال کربوهیدراتها به سلولهای عضلانی دارد. با توجه به توصیههای کربوهیدراتی برای دویدن در مسافتهای طولانی، این کربوهیدراتهای اضافی قطعا به شما کمک میکند!
Generally speaking, runners should not run more than two marathons a year. If you recently ran a marathon at your top speed and at your full potential, it's best to wait a period of four to six months before racing another.
A good rule of thumb is the harder you run a marathon event, the longer you should wait before running your next.
Considerations for Running Multiple Marathons a Year
The limit of two marathons per year is roughly based on conventional wisdom and research showing skeletal muscle damage, a severely compromised immune system, and oxidative DNA damage to the body of marathon runners after the completion of a 26.2-mile race.2
Muscle damage and inflammation in the body can last around seven days after a marathon.3 Muscles can take anywhere from three to 12 weeks to repair themselves, leaving you susceptible to tears, muscle collapse, muscle strain, or muscle cramps during that time.4
After a marathon, your body releases cortisol to reduce swelling,5 compromising your immune system as a result. Resting and taking a much-needed break from running is essential for recovering from the damage caused by running a marathon. To reduce the chance of injury and prevent further damage, after a marathon, many elite runners take two weeks off from running. They then take two additional weeks to ease back into training with very easy, light runs.
Deciding on Your Timeline
Listen to your body. Running a marathon places a lot of stress on the body, even if you don't feel particularly sore or run down, which is why it really is best to wait before competing in another marathon so soon after your last race.
با مربیان دو و متخصصان پزشکی صحبت کنید تا مشخص کنند که آیا دویدن در چند ماراتن برای شما بیخطر است و اگر چنین است، بین آنها چه مدت زمان باید فاصله باشد.
شاید بهتر باشد مسابقات کوتاهتری را بدوید و سپس به تدریج به ماراتنی که 4 تا 6 ماه دیگر است، برسید.
علیرغم آگاهی از خطرات، دوندگان ماراتنی وجود دارند که دو یا چند ماراتن را در سال و در برخی مواقع پشت سر هم میدوند. اگر احساس میکنید که سطح آمادگی جسمانی شما در حد این چالش است، نکات زیر را برای جلوگیری از آسیب دیدگی مد نظر قرار دهید.
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Plan for the Year Ahead
Select your marathons well in advance so you can plan your training around them. Remember that running is cumulative. You won't train for 26.2 miles over 18 to 22 weeks, then repeat the same sequence immediately after running the first marathon. Your fitness level and running capacity will have increased and your body require a slightly different training schedule that accounts for the long run you just finished.
Take Time to Recover
Take at least three weeks to let your body recover before you start another marathon training schedule.1
That means no hard workouts or really long runs. Regardless of how hard you ran and how much soreness you experience, running 26.2 miles takes a toll on your body and it's important to take the proper steps for recovery.
Muscle soreness usually diminishes a few days after running a marathon, but your muscles will still need time to rebuild and rebound, which may take anywhere from three weeks to 12 weeks. Follow a "reverse tapering" schedule, where you slowly ease back into running.
Your recovery plan should also include the proper nutrition to repair tissue damaged during both the marathon and your training. Follow a balanced, whole foods diet high in protein and the adequate carbohydrates and fats you need to get you back to peak performance.6 The sooner your body can recover, the sooner you can jump back into training for the next big race.
Eat Well
For recovery, drinking plenty of water and opting for a diet high in protein, fatty acids, and vitamin C is essential for rebuilding muscle tissue and reducing inflammation in the body. The following foods are high in protein and can aid in your recovery:
Lean beef
Fish
Poultry
Low-fat dairy products
Beans
Nuts and seeds
Eggs
Whole grains such as whole wheat and jasmine or basmati rice
Fatty acids can be found in cold water fish such as salmon, nuts, seeds, olive oil, and avocados.
Vitamin C can be found in green leafy vegetables and many fruits.
Once you have returned to training, increase your carbohydrate intake (carbs are found in whole grains, rice, fruits, and vegetables).
Assess Your Pace and Effort in Your Last Race
If you took it easy during the marathon and ran it as a training run or for fun—and you don't have any lingering pain—then you should be OK to run another marathon in about 4–6 weeks after your marathon.
Keep in mind that you should only consider running a second marathon so soon after the first if your training for the first race had you logging four to five runs a week, amounting to about 40 to 45 miles per week. You should have also logged at least one long run of 16 to 20 miles in your training.
If you are waiting for more than four weeks after your last marathon, make sure you take it easy for at least two weeks, and then pick up with your marathon training schedule for the remaining weeks.
Include a Variety of Distances
Just because you ran a full marathon doesn't mean that's the only type of race you must, or should, stick to.
Doing 5K, 10K, and half-marathon races between full marathons can help you develop your speed work while improving your VO2 max (the maximum amount of oxygen that can be delivered and used for cardiovascular exercises by your body).
You will not increase your VO2 max if you always run the exact same distance, at the exact same pace, for the exact same time each time you run.
Luckily, you don't have to wait six months after running a full marathon to run a 5K or 10K race. If you are itching to enter a race soon after completing a full or half marathon, waiting four to six weeks before partaking in a fun run should be sufficient time to allow your muscles some recovery from your full marathon.
Adjust Your Expectations
You shouldn't necessarily aim for a PR in every race you enter. If you are running two marathons back-to-back with less than eight weeks in between, adopting a "less than peak performance" mentality is a good idea. Think of your subsequent run as a fun run. Doing so will allow you to pace yourself and reduce the amount of damage to your body.
Even though you shouldn't expect a personal record every time, there are ways to structure your training schedule so that you don't hinder your recovery period, continue to improve your energy systems, and develop your aerobic capacity.
Consider this sample training schedule for completing two marathons, and a few shorter races, all within one year.
Sample Training Schedule for Multiple Races Per Year
یک تمرین ماراتن پیشرفته 16 تا 20 هفته ای را دنبال کنید. برنامه ریزی کنید؛ روی توسعه VO2 max خود کار کنید، میزان مسافت دویدن خود را افزایش دهید و کراس ترینینگ جلسات اینتروال را در برنامه خود بگنجانید.
July to November
Participate in a full 26.2 mile marathon.
November
Rest and ease back with very easy, light runs for about two weeks.
November to December
Begin recovery training. Be sure to include strength training and stride work.
December to January
Spend the next four weeks working on speed by concentrating on drills and interval training.
January
Participate in a 5K or 10K race.
End of January to February
Fall back into week 10 to 12 of your original marathon training schedule.
February to May
Participate in second full 26.2 mile marathon.
Mid-May
Rest and ease back with very easy, light runs for about two weeks.
End of May
Begin recovery training. Be sure to include strength training and stride work.
June to July
Spend the next four weeks working on speed by concentrating on drills and interval training.
July to August
Participate in a 5K or 10K race.
August to September
2 weeks of recovery and light runs.
September to October
Change things up. Jump into half-marathon training. This is a good way to maximize your anaerobic threshold before reverse tapering and going back to training for another 26.2 mile marathon in six months.
October to December
Avoid Burnout
Running multiple big races back-to-back is certainly not for the faint of heart. Even the most advanced runners will find that they have to change up their training strategy to continue making gains.
Do remember that just as scheduling rest days is critical for recovery, injury prevention, and burnout,10
so is waiting a healthy amount of time between running full marathons.
The debate over running on a treadmill vs. outside is not a new one. Running outdoors can improve stability by forcing you to navigate ever-changing terrain. But a treadmill forces you to sustain speed and performance levels that might otherwise lag outdoors.
Ultimately, there is no right or wrong answer to the debate over treadmill vs. outside running. Both methods have their pros and cons based on your individual training needs and goals and both can have their place in your running routine.
Is Running on a Treadmill Easier?
Athletes can get the same workout whether running on a treadmill or outside as long as they maintain the same level of effort. But "effort" can be a subjective measure.
Clinically speaking, effort is based not only on your heart rate but on a phenomenon known as perceived exertion. Perceived exertion refers specifically to how "hard" you consider an activity to be, irrespective of how your body responds to that activity.
Perceived exertion matters because we tend to give up sooner if something is perceived to be difficult. This psychological component can influence how much we get out of one exercise compared to the next.
However, if assessing the real, rather than perceived, benefits of running, outdoor running will usually come out on top. Even if you run at the same pace on a treadmill, you will generally expend more energy running outdoors. This difference in calorie burn is not only due to variations in terrain, weather, and wind conditions but also because the treadmill ultimately does a lot of the work for you by propelling you forward.
Treadmill Pros and Cons
Pros
Cons
No weather or temperature constraints
No weather or temperature constraints
Easy to control pace
Can't make turns
Convenient
Can be boring
Easier on the joints
Pros
Treadmills are one of the most popular pieces of cardiovascular equipment both at home and in gyms, thanks to the many advantages they offer.
No weather or temperature constraints
Running in inclement weather is uncomfortable, even if you dress for it. In hot weather, there is a risk of dehydration or heat exhaustion. And it's risky to run on snow and ice. Inside on a treadmill, you avoid these discomforts and risks.
If you're running at home or at the gym, you're in a climate-controlled environment and safe from any inclement weather. You also don't have to worry about sunscreen, or about over- or under-dressing and being caught far from home without the right gear.
You Can Simulate (Some) Race Conditions
If you're training for a hilly marathon, you can run hills on the treadmill even if you don't have access to a training route with hills. Study the course and plan your treadmill hills for the appropriate points.
You can even use treadmill runs to try out race day clothing and make sure your gear will work for you.
You Can Control Your Pace
Outside, it can be difficult to maintain a consistent pace. For this reason, treadmill training can be a good solution if you are coming back from an injury. The treadmill makes it easy to track your mileage and pace.
You can also stop anytime you want. But you can also use the treadmill pace to push yourself.
Home treadmills let you run on your own time, even in bad weather, late at night, or when you need to keep an eye on your children.
You Can Multi-Task
On a treadmill, it's safe to use headphones to listen to music or podcasts. You can watch TV or even page through a magazine or book.
It's Easier on the Joints
Treadmills offer better shock absorption than pavement or roads, which means less stress on the ankles and knees. And when you run at an incline on the treadmill, you build strength and endurance like you would running hills outside. But you don't have to run downhill, which can be hard on your body.
You Can Run Alone and at Any Hour
Running indoors on a treadmill means you avoid the hazards of running outside. It's also safer than running outside by yourself, without a running partner or group.
Cons
While there are many benefits to choosing indoor treadmill workouts, it's important to know some of the dangers and drawbacks of treadmill running.
You Can Still Get Hurt
While treadmills are considered the safer option by most users, the CPSC reports that there are more than 24,000 treadmill-related injuries in the U.S. each year. These include sprains, falls, head injuries,2 and cardiovascular events in people who either ran too fast or pushed too hard. (But the figures for outdoor runners are much higher.)
You Can't Go Downhill
Most treadmills don't have a downward incline feature which you need to strengthen the anterior tibialis muscles at the front of your legs. If you're training for a race with lots of elevation changes, you'll want to train for downhill portions of the course as well.
You Can't Make Turns
Similarly, there are no turns on a treadmill, limiting your ability to improve your lateral agility.
Can be boring
Even with music or TV to keep you company, treadmill running for a long period of time can be tedious. While treadmills may be great for short interval runs or speed training, they can be very monotonous for hours-long running sessions.
Outside Running Pros and Cons
Pros
Cons
Inexpensive
Some risk of injury
Prepares you for road races
Dependent on weather conditions
Burns more calories
Can be dangerous
Provides more variety
Pros
From being outdoors with nature to people watching, there are many notable benefits of taking your run outside.
Inexpensive
Running outside is free and you aren't constricted by a gym's schedule or the availability of machines. You don't need to purchase a gym membership or a treadmill to enjoy running outdoors.
You Can Continue Training Even When Traveling
Hotels can often suggest nearby routes. Running is a great way to check out a new place. As long as you take safety precautions and use a pre-planned route, running can be a great way to explore a new destination.
It Provides Sport-Specific Training for Road Races
By running outdoors, your muscles and joints will be more conditioned to the varied terrain you'll encounter in a race. Depending on your race, train on a track, road, or trail, and you can closely mimic your final race conditions. You'll be better able to adapt to changes in weather and know when to exert extra effort when faced with elevations or known obstacles.
It Allows You to Enjoy Nature and Breathe Fresh Air
Some research has even shown that exercise is more enjoyable when it's done outside.3
And you can explore a new place more quickly and easily while running. You cover more distance, so you see more sights.
It Can Be Motivating
Running outside—whether you're planning a route to the end of the block or beyond—can be encouraging. It's also fun to complete a distance goal outside. Even if you're not motivated, if you're doing an out-and-back route, you still have to complete your route to get home.
Burns more calories
Thanks to wind resistance outside, you have to work a little harder to keep up your pace, which means a greater calorie burn.
Cons
There Is a Risk of Injury
According to research from the University of Applied Sciences in the Netherlands, knee injuries are by far the most common, followed by lower leg, foot, and ankle injuries, respectively.4 Throughout the course of an outdoor running route, you can experience different and uneven terrain, potentially increasing your risk for injury.
You're Dependent on Weather Conditions
Whether you're running in winter or summer, inclement weather can happen at any time, leaving you running outdoors in sudden rain or snow.
Additionally, running outside means you're watching the heat and humidity index to avoid potential heat exhaustion in the hot summer months.
Can be dangerous
In addition to overuse injuries, there are other hazards outside, including falls, darkness, cars, cyclists, dogs, and other people.
Making the Choice
If your sole intention is to meet and maintain your cardiovascular fitness goals, a treadmill may provide all you need. By pairing the exercise with an accurate pulse monitor, you can push yourself appropriately while keeping well within your maximum heart rate (MHR).
On the other hand, when training for a race event, you will clearly benefit more from running outside. While you can incorporate treadmill running to improve your cardio health, experts generally recommend limiting it to no more than 40% of your overall training.
No matter your fitness goals, remember that where you choose to run is a personal preference. If you prefer indoor running versus outdoor running, you're more likely to commit to the routine, and vice versa.
The choice between treadmill running or running outside doesn't have to be an either-or decision. When you lace up and get moving, choose the best route for you. A combination of both may work for you, and if it's practical and fits your schedule, you'll reap the benefits of each.
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Frequently Asked Questions
Is a treadmill or an elliptical closer to running outside?
Both the treadmill and the elliptical are great cardio machines if you're looking to work on your endurance. However, to most closely mimic the style and impacts of outdoor running, head toward the treadmill rather than the elliptical.
The elliptical can be a helpful cross-training tool, but a treadmill can best prepare you for outdoor runs or races.
How can a beginner start running outside?
Running can be an effective way to burn calories and to add movement to your routine. The many great benefits of the sport—especially if you're doing it outdoors—are that it requires few pieces of gear and can be done virtually anywhere.
To begin running, begin with an easy run/walk method that incorporates intervals of walking between short running intervals. With time, you'll begin to increase the running intervals and decrease the in-between walks. Follow a beginner's guide to running for even more helpful tips for new runners.
What treadmill incline is equivalent to running outside?
Because the treadmill belt propels your stride forward (unlike running on the road or track), many experts and treadmill runners adjust the treadmill include to 1% to account for the belt's motion.
As spring rolls in, many runners are grateful to be able to run outside without suiting up for freezing temperatures. But warm, sunny weather can also bring along another trademark of summer—air pollution.
In large cities and other areas with power plants, industrial centers, or just lots of cars, increased levels of pollutants in the air can become a real health hazard. When the air pollution gets bad, you’ll still probably want to get your run in. The question then becomes whether to put up with the drudgery of the treadmill or go outside and run in the polluted air.
This article will take a look at the effects of air pollution on athletic performance, with an eye both for training and racing in poor air quality.
Air Pollution And Running – The Studies
The first major studies on air pollution and endurance were undertaken in the ’60s, ’70s, and ’80s, after it was decided that the 1984 Olympics would be held in smoggy Los Angeles. Another big round of research followed in the early 2000s leading up to the Beijing Olympics.
Fortunately, these studies looked at all of the questions we’d be interested in: Does air pollution affect performance? Does it affect health? And are there any ways to mitigate its effects?
What studies say
In a fairly detailed review article published in the months before the 1984 Games, Roy Shephard at Toronto Western Hospital described the effects on the body of polluted air. These were broken down by whether the chemical pollutants were oxidants or reductants.
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Oxidants
Oxidating smog, according to Shephard, includes carbon monoxide, unburned hydrocarbons, ozone, and oxides of nitrogen.
While oxidating smog comes mostly from car exhaust, reductive (in the chemical sense) smog is the result of coal power plants and other industrial burners discharging sulfur oxides into the atmosphere.
Among the pollutants in oxidant smog, carbon monoxide has a predictable, detrimental effect on your blood’s ability to transport oxygen using your red blood cells. The carbon monoxide diffuses into your blood through your lungs, occupying the oxygen bonding sites on red blood cells, and is very slow to be removed from your body. As the amount of carbon monoxide in your blood increases, your performance drops linearly, since there is steadily less blood available to carry oxygen. مونوکسید کربن از طریق ریهها درون خون شما پخش میشود و نقاط پیوند اکسیژن روی گلبولهای قرمز را اشغال میکند و بسیار کند از بدن خارج میشود. با افزایش مقدار مونوکسید کربن در خون، عملکرد شما به صورت خطی کاهش مییابد، زیرا خون کمتری برای حمل اکسیژن وجود دارد.
In areas with heavy smog, like Los Angeles or Beijing, up to five percent of all of your red blood cells can be overwhelmed by carbon monoxide, and at these levels, even muscular coordination and perception of time can be impeded.
The other oxidant chemicals, like ozone and hydrocarbons, irritate your throat, nose, and airways. When you exercise in polluted air, ozone in particular causes chest tightness and coughing. Shephard cites a study which demonstrated an 11% decrease in oxygen intake after two hours of exposure to levels of ozone similar to those in polluted areas.
Reductants
The chemicals in reductant smog have a tendency to irritate your lungs, because the sulfur oxides combine with water in the air or in your lungs to create acidity, which causes airway restriction along with the particulate matter also present in polluted air. This problem is especially severe in athletes who already have asthma.
Shephard also notes that the damage to the lungs and airways that results from air pollution exposure can also increase your risk for upper respiratory infections like the common cold. The reasons behind this—damage to the delicate tissue at the surface of the lungs and airways—appears to be the same reason deaths from chronic respiratory diseases increase when pollution is bad.
How does this impact your performance?
Other studies have also linked sulfur oxides, ozone, and carbon monoxide to decreased athletic performance. Exposure to pollutants generally leads to a predictable, linear drop in your ability to take in oxygen.
A study by Wayne Walborg and colleagues, for example, found that higher levels of oxidants in the air were correlated with slower cross country race times among high school boys in the Los Angeles area.
More work has also revealed that exercise exacerbates their effects, since the deep, heavy breathing you use while running both increases the total volume of air moving in and out of your lungs and also allows pollutants to bypass your nose, where the mucous tissues can trap some of the chemicals before they get to your lungs.
Unfortunately, when it comes to mitigating the effects of air pollution, there is not a whole lot that can be done. Shephard recommends the following:
Taking vitamin E and vitamin C supplements to mitigate the oxidizing effect of some of the chemicals in smog, but admits there is scant evidence for their usefulness.
Aside from that, the best you can do is avoid the times of day with the worst air quality—rush hour in the morning and evening, for most American cities—and limit your time outside on days with particularly bad smog.
Especially if you have asthma, it might make sense to move a longer or faster workout to a day without as much air pollution, or do it inside on a treadmill.
You can check the air quality index and the forecast at airnow.gov, which comes with some useful maps and guidelines for air pollution levels.
If you do decide to go ahead with a workout or race when air quality is poor, be aware that your oxygen intake will be impaired, so your times will likely be slower than on a day or in a city with clean air.
Dr. Dave’s Do-Do rule says, “It’s not how much training you DO, rather, it’s how well you recover from the training you DO DO. Because, if you get injured or sick from DOing too much, you are in deep DOO DOO.”
Joe Vigil, another one of my mentors, says, “There’s no such thing as over training, just under recovery.”
The point of both great coaches is that training really comes down to recovery. How fast can you recover from the training stress so you can be ready for the next big training session? It’s the basis of the stress/rest cycle I’m always going on and on about.
It’s the basis of the stress/rest cycle I’m always going on and on about.
So, the question is, “How much better would your training be if you could accelerate your recovery?” Use the strategies below and let’s find out.
Easy Strategies for Accelerating Recovery
There are many, many recovery strategies but here are a few that are easy for every runner to implement immediately:
#1) Modulate Your Training Load
Obeying the stress/rest cycle is a core principle in training. So, if you want to accelerate your recovery, make sure that after a big stressor like a long run, hard workout or race, you lower the stress in upcoming runs so you are never over trained. The easiest way to accomplish this is through modulation of your training load.
In simple terms, it means that the day (or two) after a hard/long workout or race you lower the training load by running slower (aka easier) and/or shorter (less duration/distance). This probably makes sense but as you get really, really fit (usually in the last 4-8 weeks before your big race), it can become easy to run too fast on recovery days. The fitness is there. You feel great and are getting into a “racers” mindset so it’s very, very important that you purposely reduce your training load by running slower on your recovery days (and shorter if you are extra tired).
This strategy keeps the body happy (fewer injuries from running too fast on tired legs) and sets you up so you have really high-quality workouts in the coming days (which not only builds more race-specific fitness but also boosts your confidence and motivation for your race). That’s a win-win.
#2) Ramp Up Rest
The greatest recovery tool you own is your bed. Sleep is an endangered species in modern society but as a runner, you must focus on getting good rest. A regular bedtime as well as a good pre-sleep routine can really help you get more and better sleep. I encourage you to set a time to go to bed every night and religiously stick with it, especially in the last 8-10 weeks before your big race.
Research shows that a sound bedtime routine includes turning off your devices, shutting out the light, having a comfy linen set, cooling down the room, reducing caffeine in the hours before and quieting your mind as you slowly wind down from the day. Just as you probably have a warm-up routine before your big workouts, create an evening “pre-sleep” routine that you follow each night. You’ll be amazed at how much better your sleep is.
But it doesn’t end there, any resting you do is helpful. I remember a documentary on the great Seb Coe. He mentioned that in his serious training period, he wouldn’t even go to the shops as it was time on his feet that would interfere with his recovery. It was all about resting up for the next big training session
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So, I encourage you to not only think about your sleep but also just about resting. Take time to nap, lay down or simply sit down and rest. Close your eyes. Relax and rest. If you’re feeling a little bit bored from the resting, then you are doing it right! Force yourself to spend more time relaxing. Your workouts will improve.
#3) Nutrition/Hydration with Occasional Slump-Buster Meals
Every runner knows that nutrition is fuel. It provides energy, rebuilds the body’s tissues that are damaged from training and even builds new you (mitochondria, capillaries, enzymes, etc.) that boosts fitness. So, it goes without saying that you can use nutrition to enhance recovery.
I’ve written for many years about Dr. Edmund Burke’s post-workout routine that is detailed in my article the Runner’s Ultimate Nutritional Recovery Routine (RUNRR). Commit to have a shake or smoothie (carbohydrate plus protein) in the 30 minutes after each hard or long workout and you’ll ramp up your recovery.
But it doesn’t end there. In addition to good daily nutrition and the RUNRR after hard/long runs, the occasional “slump-buster” meal can help you recover as well. At the first Olympic Development Team I coached, I used this strategy every two to four weeks to accelerate the athletes’ recovery.
Whenever I noticed that the athletes were extra tired, moody and/or feeling more fatigue than expected, we’d load up the van and drive to the burger joint. They’d load up on burgers, fries, shakes, beer, whatever they wanted. It was a big comfort food meal (calorically dense and tasty) plus I think the comradery and fun dinner out added to the recovery enhancement.
This slump-buster meal always picked them up. It seemed to reset the body/mind and their training immediately improved. Did we do it every day? Of course not. We stuck with sound nutrition most of the time but over the years, I’ve found that when an athlete gets run down and moody, a slump-buster meal works like magic. And it can be whatever makes you feel good. It’s usually some type for comfort food that delivers a lot of calories but also soothes the mind as well. What would yours be?
#4) Funny Shows and a News Fast
For far too long, we’ve underestimated the importance of the mind/brain on recovery. But neuroscience is pretty clear that you can manipulate your brain and that can help it recover faster. Mediation works well (and fits in with getting more rest above) but an outstanding strategy is to watch funny shows.
Anything that makes you smile and laugh can have a profound effect on your recovery. Make a list of go-to shows and movies that make you laugh out loud. After hard/long workouts or when you are feeling extra tired, watch one (or two!).
And because the brain responds to what it sees, taking a “news fast” during your recovery period (the 24-48 hours after a hard/long workout) is an excellent strategy as well. I learned of this from Dr. Andrew Weil and have used it very successfully with my own training and my athletes.
The news (TV, print, online) is mostly negative and that negativity is a drain on the mind/body. So, skip it. Trust me. You won’t miss anything, and your body/mind will feel more refreshed and excited about the upcoming training.
#5) Ice baths
There is a reason that athletic training rooms have dedicated spaces for ice baths. They work. And, not just for the body. They can help your mind recover as well.
Add ice baths to the 24-48 hour period after your hard workouts and your legs will feel fresher. This is especially important as the race nears. You want to do everything you can to feel better and have higher quality workouts and a 10-20 minute ice bath, performed after every key workout in your race-specific training period, ramps up your recovery.
#6) Mobility
The idea of mobility (aka stretching, flexibility) has evolved over time and we now know that active isolated mobility (aka Wharton rope stretching) as well as runner-friendly yoga positions, can play a huge role in recovery.
And it’s not just about the muscles. Active isolated mobility helps the nervous system calm down and since a hyperactive nervous system can keep the muscles in slight contraction, a calm nervous system allows the muscles to relax.
Additionally, the focus on breathing and relaxation in yoga helps the mind/body loosen up and recover as well. That’s why our Yoga Recovery Routine for Runners has been so popular. Athletes who do it in the evenings after their big workouts, report that they sleep better and feel better on the next day’s run. Add these to your usual foam rolling, self (or professional massage) and your other recovery methods and you’ll see a big jump in your readiness for training.
Essential in Your Race-Specific Phase
That is six, very simple and very easy ways to accelerate your recovery. While you many not worry so much about recovery in your base or preparatory phase, I encourage you to ramp up your focus on recovery during your race-specific phase (the last 8-10 weeks before your race).
First, (and I’ve mentioned this a few times), you want to have really high-quality workouts during your race-specific phase. This builds greater fitness. Low-quality workouts due to under recovery misses key opportunities to build that race fitness you want/need (and they can be a blow to your confidence).
Second, runners often get hurt during their race-specific phase. It makes sense, right? You are fitter so you are doing harder and often longer workouts than before. So, the musculoskeletal system is really taking a beating. And as I mentioned, it’s also easy to run faster on easy days because your fitness has improved. This is a double whammy for the body. You push it harder in the key workouts and then push it harder in the easy workouts. It’s a recipe for injury but with a focus on recovery, you can avoid this common training
Lastly, your best races require a high level of motivation and confidence. These two key ingredients often come from excellent race-specific workouts. So again, if you can recover faster and better, you can perform better in your key workouts. And if you can run better in those workouts, your confidence grows and your motivation soars. A fit and motivated athlete has a very, very high chance of meeting the goal.
Final Thoughts
آیا استراتژیهای ریکاوری بیشتری هم وجود دارد؟ البته!
اما نکته این مقاله این است که بدون هیچ گونه تجهیزات خاص، مکملهای الکی یا هزینه، میتوانید ریکاوری خود را تسریع کنید و سطح تمرین خود را بالا ببرید. این استراتژیها را امتحان کنید.
Determining your weekly mileage during race training is a delicate balance: You want to run enough miles to physically prepare your body without running so much that you end up overtaxing yourself and toeing the starting line spent—or worse, injured.
It’s also individualized as it depends on your speed, strength, experience, base, and goals. Unfortunately, there’s no one-size-fits-all prescription for how many miles a week to run.
It’s also individualized as it depends on your speed, strength, experience, base, and goals. Unfortunately, there’s no one-size-fits-all prescription for how many miles a week to run.
“If you’re running your first 5K, you might start with a minimum five-mile-per-week program. If you’re running your first marathon, you might start with a minimum of 15 miles per week,” Kann says.
Rather than looking for a specific mileage plan, think of it more like building up to a certain amount of time on your feet. “This allows the runner to progress safely,” says Rich Velazquez, a running coach at Mile High Run Club in New York City.
Still, there are a few rules of thumb and general guidelines that can help you come up with how many miles a week to run.
And, determining how many miles to run for a race first means knowing how many miles are in the distance you’re choosing.
How many miles in a 5K: 3.1
How many miles in a 10K: 6.2
How many miles in a half marathon: 13.1
How many miles in a marathon: 26.2
Rule 1: The longer the race, the higher the mileage.
Duh, right? If you’re training for a marathon, you’re obviously going to need to log more weekly miles than if you’re training for a 5K. No matter the race distance, though, there are three main components to a cohesive running program, says Velazquez: a long run day, a speed day, and a recovery day.
“Your long run should be conducted at a slow pace and eventually last as long as your projected race time (remember, it’s about time on feet versus miles); your speed day is shorter in duration but faster than your predicted race pace; and your recovery day should be an easy/slow pace and lower mileage than your planned race,” he says.
So you’ll have some longer runs and some shorter runs no matter what you’re training for; the ultimate mileage, of course, depends on your race distance.
Rule 2: Mileage requirements increase as performance goals increase.
If your goal is simply to finish a race, you can run fewer miles than if your goal is to finish with a fast time.
“But as your goals shift towards performance, weekly mileage will most likely increase to support the demands of these goals: aerobic capability, energy utilization and sustainability over elongated periods of time, and efficiency of movement,” says Velazquez.
That’s because logging that time on your feet is what’s going to give you a stronger engine, adds Kann. “Obviously, your musculoskeletal system is going to get stronger as you spend more time on your feet,” she says.
“But when you’re out there running, you’re fueled by oxygen—that’s what gets your muscles to fire and gets the blood moving around. So the more time you spend on your feet, the more it’s going to increase the capacity of your aerobic engine, which is going to fuel you to go stronger for longer.”
Rule 3: Not all miles are created equally.
No runner should go out and run the same pace every day; any good training plan should include speed, interval, tempo, and distance training, all of which offer different benefits.
“Speed training is where the body will shape and improve its running economy (energy demand for a given speed) thus improving overall efficiency in energy consumption and oxygen utilization,” says Velazquez.
“Interval training aligns specific speeds with specific intervals and set rest periods, tempo running is about maintaining consistent speeds over longer periods of time, and distance training is about getting the body used to impact and elongated performance.”
The point of all those different training modalities? Ideally, you become a better, more well-rounded runner.
“If you only run at race pace, that’s the only pace you know,” says Kann. “You want to get your system ready to be comfortable moving at paces faster than race pace, so that when you get to race day, that pace doesn't feel so hard.”
While the bulk of your miles should be easy, aerobic-based miles, those faster miles get you to that point where you're clearing away the waste product in your muscles at the same rate that you're accumulating it, she explains, which will make your body more efficient come race day.
Rule 4: Allow for adaptation when increasing mileage.
To avoid injury when upping your mileage, you need to take it slow and allow your body time to adapt to the increased workload. Many runners follow the 10 percent rule—i.e. never increasing your weekly mileage by more than 10 percent over the previous week.
“Most programs will build mileage week over week for about three weeks before introducing in a low mileage week (recovery),” Velasquez says. “From there, the buildup will start again as the body should have adapted from the increased volume with the rest and be ready and able to tackle more.”
Think about your runs in terms of quality over quantity, Kann says. “If you’re adding additional speed workouts to your week, you don’t want to run a super long run that weekend,” she says.
“You’re just asking a lot of your body all in a short period of time.” Your body, on a microscopic level, is breaking down muscle tissue when you run, and it needs to time to rebuild (that’s how you get stronger).
It’s important to look at the whole picture when it comes to weekly mileage, and think about the kind of miles you’re running and how that will impact your body.
Rule 5: Listen to your body.
When you’re following a training plan, it’s natural to want to hit the exact mileage that’s indicated—that’s how it works, right?
“We always tell people to start with a plan, but that plan is not the letter of the law,” says Kann. “It's not like you're going to get a failing grade if you don’t stick to that plan 100 percent.”
Running mileage just for the sake of running mileage can actually backfire, because overtraining can lead to a general disintegration of performance or even injury. “Broken sleep, elevated resting heart rate, lack of motivation and restlessness are all signs of overtraining,” says Velasquez.
With running comes a certain level of discomfort; part of the challenge is pushing yourself past those I-don’t-know-if-I-can-do-this boundaries. But Kann doesn’t advocate running through pain.
“Discomfort naturally comes with training as your body adapts, but if you feel the pain on one side of your body and not on the other or if you’re dealing with some kind of persistent pain, that's a sign that there's some kind of imbalance at play,” she says. When in doubt, err on the side of caution and pull back your pace or take a rest day. No runner ever healed any kind of pain or injury by running more.
Rule 6: A healthy runner beats an injured runner every time.
At the end of the day, the most important goal of any runner—whether you’re running a marathon, half marathon, 10K, or 5K—is to make it to the starting line without injury.
“The last thing you want is to overload yourself, break yourself down, and then push yourself past your limits,” says Kann. “That’s when you're gonna pull yourself out of the game for three weeks to recover. Then you’re really in trouble.”
“If you’re not feeling up to run, rest and reschedule,” says Velazquez. “And should that feeling persist, people training for longer races (i.e. a marathon) should give priority to the long run over the speed training.”
Remember: No one’s grading you on how well you stick to a mass-produced plan anyone on the internet can download. The real test is race day, and just how well you can get through it.
Rule 7: Adjust your base accordingly when coming back from injury.
You had your weekly mileage mastered when you were healthy, but if you’re sidelined with an injury, it requires a tweak. Before you get back to running, make sure you can walk for at least 45 minutes without pain, says exercise physiologist Susan Paul. Walking will help recondition your muscles, tendons, and ligaments to prepare for the more vigorous demands of running to come.
Then, you need to consider how long you’ve been off, adds Adam St. Pierre, a coach for CTS in Colorado Springs. If you’ve been sidelined for a week or less, you can pick up where you left off.
(You may even feel better when you do!)
But for a break of up to 10 days, start running at 70 percent of your mileage.
For 15 to 30 days off, dial back to 60 percent.
For a hiatus of 30 days to three months, start at half of your previous mileage.
If you’ve been off more than three months, you should start your weekly mileage from scratch.
Target Totals:
The number of weekly miles to shoot for differs based on goals, baseline, and experience, but here’s an estimation to help guide you.