This is not good. Because your body will produce a lot of heat after exercise, and the water in the swimming pool is generally cold, which will take away a lot of heat from your body and make the skin temperature drop too fast. Through the reflex activity of the nervous system, it will cause vasoconstriction of the upper respiratory tract, slow oscillation of nasal cilia, and reduce the local disease resistance. At this time, bacteria and viruses parasitic in the respiratory tract will multiply in large numbers, which will easily lead to diseases such as colds, colds and tracheitis.

Some people swim in the water or take a cold bath immediately after strenuous exercise. Because of the great difference between body temperature and water temperature, calf cramps are also prone to occur. Therefore, after strenuous exercise, you should dry the sweat first, and then it is more appropriate to go swimming or take a cold bath when the sweat stops.

Extended data

After taking part in strong physical labor or strenuous exercise, you should not jump into the water to swim immediately, especially in the case of sweating and fever, otherwise it will easily cause cramps and colds.

Cold, illness, physical discomfort or weakness, after meals, fasting and drinking are not suitable for swimming.

It's best to experience the water temperature before swimming. If the water temperature is too cold or too hot, try not to rush into the water. The temperature of the pool water has an influence on blood circulation, heart, blood pressure, respiration, metabolism, human skin and muscles.

References:

Swimming (Sports) _ Baidu Encyclopedia?