Staying in shape: A case of use it or lose it - Harvard Health

Fitness levels rapidly diminish when people abruptly stop workouts. Cardiovascular fitness declines within weeks, while muscle strength deteriorates after about two months. The longer a person hasn't exercised, the longer it will take to regain prior fitness levels.

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A Pill to Make Exercise Obsolete

Can exercise extend your life? - Harvard Health

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Don't let muscle mass go to waste - Harvard Health

Want to live longer and better? Do strength training - Harvard Health

Do more for your core - Harvard Health

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Swimming: Benefits, Calories Burned, Muscles Worked

Exercise & Fitness - Harvard Health