Generally in about 30 minutes after exercise can drink water, it is recommended to drink warm boiled water. Most of the blood and nutrients in the body after exercise are present in the body’s muscles and bones, at this time the stomach blood and stomach mucous membrane function is poor, drinking water immediately after exercise can increase the burden on the stomach, and even cause gastric dysfunction and cramps. In addition, before exercise, you should also avoid drinking too much water, otherwise it may lead to increased gastrointestinal tract contents. It should be noted that if ice water is not recommended after intense exercise, it can easily stimulate the respiratory and digestive systems and cause gastrointestinal discomfort. In addition, the main electrolytes in sweat are sodium and chloride ions, before drinking warm water after exercise can drink some drinks containing electrolytes to replenish lost salt. In addition, after the end of strenuous exercise can not immediately enter the cooling air-conditioned room or a cold shower, easy to muscle cramps, resulting in upper respiratory tract discomfort.