HIIT is the abbreviation of high-intensity intermittent exercise. It burns a lot of heat through short-term high-intensity exercise, rest in the middle, and then high-intensity exercise. HIIT exercise takes less time, can burn fat and lose weight more effectively, and is a very effective muscle training. Therefore, this kind of training method, since it came out, has quickly swept the European and American continents, and now it is very popular all over the world.