The temperature in water is generally lower than the body temperature, so swimming in water can better exercise the body's ability to regulate its own temperature. In addition, the energy consumed by a body standing in water for 15 minutes is approximately equal to the heat of standing on land for 1 hour, so water will naturally transfer some heat to the body and increase the basic metabolism of the body. And personally, I think swimming is a sport to relieve mental stress, and I can feel a cool and happy feeling surrounded by water.
Generally speaking, water sports don't suddenly start and stop the body like land sports. When the body makes strenuous exercise, water reduces some stimulating power to muscles, so swimming has a certain protective effect on all joints, ligaments and muscles of the body. At the same time, only when all parts of the body, muscles and joints cooperate at the same time can swimming be smoother, and water can also massage the skin and muscles to a certain extent, so it is healthier.
Remember, learning to swim means learning how to breathe. After a long time, swimming is equivalent to improving the human body's ability to breathe deeply and enhancing the human body's breathing mechanism. Moreover, when exercising in water, both the chest and abdominal cavity have to bear certain pressure. In order to get comfortable oxygen, the respiratory muscles must learn to contract and expand moderately to ensure normal oxygen intake, which will improve the breathing ability to some extent. The advantage is that it will improve your metabolism.