Really, Really Short Workouts
Briefly

In minutes, high-intensity interval training (H.I.I.T.) will have you sweating, breathing hard and maximizing the health benefits of exercise without the time commitment.
If you think you don't have time to exercise, H.I.I.T. may be the workout for you. You can try it with any aerobic activity you like.
Read at www.nytimes.com
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