When we stop exercising, we need a period of time to stop the speed of blood circulation and restore it to a normal level. If you swim immediately, you will continue to increase the blood flow to your skin. This will make the muscles tense and make the body more tired. In addition, swimming immediately will also cause insufficient blood supply to the heart and brain, which will easily make people in a state of hypoxia, and even lead to unconsciousness and dizziness; Severe collapse shock, it is recommended to rest!