1. After exercise, the body will excrete a lot of sweat and take away a lot of salt. At this time, if you drink a lot of water, the water and electrolyte in your body will be out of balance instantly, which will lead to the decrease of osmotic pressure in your blood, headache, nausea, vomiting, muscle spasm and other uncomfortable symptoms, which will affect your normal function.

2. The heartbeat has not returned to calm after exercise. Drinking water may increase blood circulation, increase the burden on the heart and even lead to myocardial infarction or sudden death.

3. Drinking plenty of water will stimulate the gastrointestinal tract and cause gastrointestinal discomfort, such as abdominal distension, abdominal pain, nausea, vomiting and other symptoms, which will affect your health.

Therefore, it is recommended not to drink water immediately after exercise, and it is best to wait until the heartbeat returns to calm before drinking water in moderation. In addition, water should be properly replenished before exercise to avoid dehydration during exercise.