All of the above is the correct answer
A runner primarily only excercise his/her legs, while a swimmer exercises most of his/her body
This is why runners primarily have stronger and bigger leg bones, because their exercise is only focused on making one thing (or two) stronger
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Answer:
Interval training is a kind of exercise that consists of a series of high-intensity workouts interspersed with rest or recovery intervals. This sort of exercise is useful because it strengthens and improves the efficiency of the heart. It also lowers the risk of heart disease and hypertension.
Explanation:
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According to statistics, currently there are approximately 22 million drug users living in the United States.
