By limiting energy intake and actively exercising, the body can achieve the purpose of fat consumption. The accurate way to prove that the body burns fat is to measure body fat percentage, but due to different self-perceptions and different ways of exercising, the signals that the body burns fat may differ to some extent, and the signals that often appear are elevated body temperature, sweating, muscle aches and mild fatigue. After excluding the increase in body temperature caused by temperature and excessive clothing, fat burning will generate a lot of heat, which will gradually increase the body temperature, and the thermoregulatory center will regulate the increased body temperature through sweating and other means. In addition, if a lot of exercise, in the consumption of fat at the same time, muscle tissue supply through anaerobic enzymatic production of lactic acid and other metabolic products, there will be muscle pain symptoms, people will also feel mild fatigue after a lot of exercise. For people who want to lose weight to control their weight, excessive dieting is not recommended to achieve the purpose of fat loss, the body in the case of excessive hunger, will first consume visceral stores of glycogen, followed by the consumption of visceral stores of fat, and finally the consumption of fat on the body surface. By excessive dieting does not achieve the purpose of consuming body surface fat, there will also be side effects. Burning fat should be done in the right way, and the common way is aerobic exercise. Aerobic exercise is the exercise in the case of sufficient oxygen, so that fat burning, to achieve the purpose of fat loss, the common way for swimming, jogging, cycling, etc..