HIIT的全名叫做高强度间歇运动，是指在运动中，高强度（通常是60s）和中低强度（通常是20s）交替进行的运动方法。HIIT是一种训练模式，并不特指某一种运动或者某一套运动方案。HIIT高强度间歇性训练已经被证明可以用来有效的锻炼心肺功能，并高效燃脂。同样的运动20分钟，HIIT训练燃脂功效要大于普通的有氧运动。

HIIT (High-Intensity Interval Training), is a training technique in which you give all-out, one hundred percent effort through quick, intense bursts of exercise, followed by short, sometimes active, recovery periods.  One of the many reasons why HIIT workouts are so popular is because they're extremely effective for weight loss. When trying to lose weight, you want to burn fat and build lean muscle to continue to burn more fat. HIIT forces your body to use energy from fat as opposed to carbs. This makes losing fat more efficiently.