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On rest and recovery days it is important to avoid doing the worst thing you can do for your body... nothing. Examples of rest and recovery activities are walking, static stretch exercises (after a warm up and loosening up period), dynamic stretching, swimming, water running, and riding a bike.
WHY IT WORKS: Exercise is by far the safest and most effective way to boost your metabolism, Barton says. Exercise not only raises our metabolic rate, but as you exercise, it also keeps your resting energy expenditure high during the recovery period.