Swimming is aerobic exercise and consumes a lot of calories. This is because the heat transfer in water is 28 times that in air, and the heat consumed by people staying in water for 8 minutes is the same as that consumed by staying in air at the same temperature for 2 hours. So it has a better slimming effect.

When swimming, people's metabolism is very fast, and they can consume 1 100 kilojoules of heat in 30 minutes, and this metabolic rate can be maintained for a period of time after you leave the water, so swimming is an ideal way to lose weight. When swimming, the human body is lifted by the buoyancy of water, and the hands and feet are used together, so that the joints and muscles of the whole body are evenly coordinated, and all parts of the human body are stretched, making the body more symmetrical.

When people exercise in water, all organs participate in it, which consumes a lot of energy, accelerates blood circulation and provides more nutrition for sports organs. The acceleration of blood speed will increase the load on the heart, make the heart beat faster and contract strongly. People who swim regularly have excellent heart function.

The average person's heart rate is 70-80 beats per minute, and the stroke output is 60-80 ml. Frequent swimmers' heart rate can reach 50-55 beats/min, many excellent swimmers can reach 38-46 beats/min, and the stroke output is as high as 90- 120ml. When swimming, the role of water makes it easy for limb blood to flow back to the heart and accelerate the heart rate. Long-term swimming will obviously increase the activity of the heart, contract strongly, increase the thickness and elasticity of the blood vessel wall, and increase the stroke output. Therefore, swimming can exercise a strong heart.

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Muscle is mainly composed of muscle tissue. Muscle cells are slender and fibrous, so muscle cells are usually called muscle fibers. In the theory of traditional Chinese medicine, muscle refers to human muscle tissue and subcutaneous adipose tissue. Spleen governs muscles, and the nutrition of muscles comes from the transportation and transformation of spleen in Shui Gu.

Muscle: name of anatomical structure. Therefore, the fullness of muscles is closely related to the rise and fall of temper. Su Wenping's theory of meteorology: "Dirty is really in the spleen, and the spleen stores muscle gas." Su Wen Wei Lun: "Spleen governs the body."

Reference: Baidu Encyclopedia Muscle