People say that winter swimming is doing blood vessel exercises, because when people are in the water, the muscles and blood vessels of the body contract due to the cold surrounding environment, and naturally the metabolism of the body increases to provide the needed heat. If the human body does not accept stress for a long time, its function will deteriorate, so winter swimming is a very good exercise, which can exercise people's stress ability.
Nowadays, many elderly people get cardiovascular diseases because they don't exercise, which is caused by lax vasoconstriction, and winter swimming is to improve this situation.
Winter swimming is a dangerous sport, so it is not suitable for people with serious diseases.
Besides, don't be greedy for winter swimming. Don't think that you will get better after swimming for a long time. In fact, swimming too much is not good for your health, because the pressure on your body has reached its limit at that time, and too much will hurt your organs.