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High-Intensity Interval training is the top fitness trend in the U.S. according to the annual survey conducted by the American College of Sports Medicine...and for good reason! HIIT is widely recognized as the most efficient and effective way to burn fat and get in top physical condition. By alternating between intense bursts of exercise and less-intense periods of activity, the body burns more calories - even after working out - in less time compared to traditional forms of exercise. Written by the Official Trainer of the Indianapolis Colts Cheerleaders, High-Intensity Interval Training for...