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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D or C is the answer. At least I narrowed it down.
I’m not sure but I would think You’re answer is D
The answer is True. <em>It is dangerous and should NOT be performed.</em>
