The process of human movement is the process of transforming chemical energy into kinetic energy. There is heat when there is exercise, and the excess heat should be discharged to prevent overheating. Therefore, discharging sweat, letting sweat take away some heat, can also cool the body after evaporation. There are about 3 million sweat glands in the human body, which have the function of secreting sweat. The discharge of sweat can regulate the temperature in the human body, and at the same time, it can also discharge some metabolic wastes. In general, the greater the intensity of exercise, the more perspiration, but the amount of perspiration varies from person to person. People with more sweat glands sweat more. Drinking water before exercise also affects sweating. If you drink plenty of water before exercise, it will lead to an increase in body fluids and sweating. In addition, it depends on the physical quality of the individual. People with strong physique have relatively healthy muscles and motor organs. Even if they exercise hard, they have no effort and naturally sweat less. On the contrary, people with poor health will sweat a little. However, regarding sports sweating, we should also pay attention to the following situations. It is easy to get heatstroke if you don't sweat during exercise. Many people often don't sweat much after thirty or forty minutes of exercise, but the skin surface is very hot. This is because the sweat in the body can't be discharged, which leads to the imbalance of body temperature regulation. If you feel hot, you should stop exercising immediately, otherwise you are prone to chest tightness and dizziness, especially in hot summer, which increases the chance of heatstroke. At this time, you can drink some ice water, apply a cold towel to your forehead or urinate in time, which can reduce your body temperature. Sweat like rain when exercising, be alert to rheumatism. Many people think that the more you sweat during exercise, the better the exercise effect. But in fact, a lot of sweating will take away potassium ions, sodium ions, salts and other substances in the human body. For people with poor physique, excessive sweating may lead to dehydration, resulting in dizziness, abdominal pain and other symptoms. In addition to poor physical fitness, you will sweat profusely when you do non-sweating exercises such as walking and playing Tai Ji Chuan. You should go to the hospital to check whether there is rheumatism. Don't take a bath immediately after sweating. This is because the summer temperature is high, and just after exercise, the human body is still in a state of vigorous metabolism and vasodilation of the skin. At this time, if you take a bath immediately, the skin will be stimulated, and the skin blood vessels will contract through nerve reflex, but it will make it difficult to dissipate heat and raise the body temperature. At the same time, the skin blood flow decreases, and the blood flow back to the heart increases, which increases the burden on the heart. Because sweat contains more sodium chloride, so sweat should be supplemented with salt and calcium. Therefore, after exercising in summer, you should drink some salt water properly, and then rest for about 1 hour before taking a bath. Of course, it is best to take a bath with warm water.