Condition analysis: it is suitable to take a bath ten to fifteen minutes after fitness, and don't wash it immediately. Taking a cold bath is also not advisable, because the body has a lot of heat to give off. Taking a cold bath will cause pores to shrink, which is not conducive to emitting heat. During exercise, a large amount of blood in the body is distributed on the limbs and body surface. Once the exercise stops, the increased blood volume will continue for some time. At this time, if you take a bath immediately, it will easily lead to too much blood entering the muscle and skin, which will make the heart and brain lack blood supply. Drinking water before and after exercise is more particular. As we all know, when we exercise, we sweat a lot. Water will run away. If you wait until you are thirsty to drink water, you will lose your balance. So we should drink water before exercise. After exercise, you will lose sweat and some electrolytes at the same time. Therefore, after exercise, when drinking water, you must drink a small amount of water many times, and don't drink a lot of water at once. Because your body temperature rises after exercise, you have to sweat and drain water, so drinking plenty of water repeatedly can easily lead to water poisoning. You can't just drink boiled water or water after exercise, you should add a little salt to it. If you drink a lot of boiled water immediately after exercise, there is no electrolyte in it, and water will enter brain cells, causing brain cell edema, which may be dizziness, vomiting and even mental symptoms. Suggestion: Drinking water before going to bed can dilute the blood, but don't drink too much at once, so as not to go to the toilet frequently at night and affect the quality of sleep. So far, if you drink 2000 ml of water a day, you're done. After a whole night's sleep, the body began to lack water. Drinking 250 ml of water before getting up helps to detoxify the kidneys and liver.