The essence of losing weight is to increase energy consumption and let you burn more fat. The energy consumption of exercise consists of two stages, one is during exercise and the other is after exercise. The intensity and duration of exercise determine the amount of energy consumption during exercise, and the amount of energy consumption after exercise depends on the length of maintaining excessive oxygen consumption after exercise. If you still take in more oxygen for a period of time after exercise, it will bring extra energy consumption.

In the process of exercise, high-intensity intermittent exercise is really strong and consumes more energy per unit. However, due to the short duration, the total energy consumption is not as much as expected, and it is usually not as good as low-intensity aerobic exercise with long duration. There is a theory that it takes a long time to maintain excessive oxygen consumption after high-intensity exercise, that is to say, the energy consumption of high-intensity intermittent exercise mainly comes not from exercise, but from after exercise.