Interval training is a kind of high-intensity aerobic exercise. Its principle is to make the body consume more energy by doing high-intensity exercise in a short time, so as to achieve the purpose of reducing fat. During high-intensity intermittent exercise, the body will adapt to the exercise just carried out and return to a static state, which requires a lot of oxygen to complete. The energy source of excessive oxygen consumption is mainly fat. In other words, after high-intensity interval training, our bodies are still burning fat for a long time.

In addition, high-intensity intermittent exercise can rapidly increase fat-burning hormones. During HIIT, norepinephrine, epinephrine and growth hormone will accumulate rapidly in the body. Adrenaline, norepinephrine and growth hormone together form a fat bomb matrix, which can quickly release free fatty acids and diglycerides from adipose tissue into the blood (promoting lipolysis).