When sweating after exercise, the capillaries on the body surface dilate and a large amount of heat is emitted in the body. At this time, if you encounter cold water, the capillaries will suddenly contract, which will easily reduce the body's resistance and cause diseases.

It is not advisable to take a hot bath immediately.

After physical exercise, a lot of blood in the body is distributed on the limbs and body surface. If you take a hot bath at this time, it will increase the blood flow on the body surface, resulting in insufficient blood supply to the heart and brain, and there is a risk of cardiovascular and cerebrovascular accidents.