1, which helps to reduce cardiovascular diseases.

Swimming, its most obvious function is to stimulate and accelerate the heartbeat, which is the best exercise for the myocardium. When swimming, when human skin is cold in water, blood vessels contract, so that a large amount of peripheral blood enters the heart and deep tissues of human body;

The expansion of blood vessels in internal organs and the flow of blood in the lumen cause greater impact than usual, which significantly improves the elasticity of blood vessel wall, increases lipase in blood and accelerates the decomposition of cholesterol, thus reducing the accumulation of deposits on blood vessel wall, which has a good effect on preventing or alleviating arteriosclerosis and cardiovascular diseases.

2, can make the body more fit.

In the process of swimming, it produces resistance with water and has the effect of losing weight. Long-term swimmers are generally slender, with broad shoulders, flexible waist and well-proportioned figure.

Extended data:

Precautions:

1, avoid swimming after strenuous exercise.

Swimming directly after strenuous exercise will increase the burden on the heart, and rushing directly into the water after strenuous exercise will cause a sudden drop in body temperature. At this time, the human body's resistance is weak and it is easy to cause a cold. So don't jump into the water immediately after strenuous exercise.

2. Avoid swimming alone.

It is best to choose a crowded place when swimming, so that you can get help in case of an accident. Beginners had better be accompanied by people who can swim.

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