The French Enlightenment thinker Voltaire once said: "Life lies in movement". Physical exercise plays an important role in human health. Physical exercise can not only enhance physical fitness, but also promote the development of people's mental health. Sports and health are closely linked.

The growth and development of bones requires continuous absorption of nutrients. Physical exercise can promote blood circulation and increase blood supply to bones. At the same time, various actions in physical exercise also have a good stimulating effect on promoting bone growth. Scientific physical exercise will increase muscle volume, reduce muscle fat, increase muscle capillaries, etc., making the body look plump and strong.

At the same time, physical exercise can make the brain clear and improve learning efficiency. Physical exercise can increase the blood supply to the brain, improve the supply of blood sugar and oxygen to the brain, promote the metabolism of brain cells, and improve the activity of the cerebral cortex. Improve the excitability, sensitivity and responsiveness of nervous activity, and improve the self-control ability of certain autonomic nerves and organ activities.

Physical exercise can also improve the immune function of the body. Research materials in my country show that people who insist on long-distance running for a long time have increased serum immunoglobulin, enhanced immune regulation function, and enhanced NK cell activity, which is conducive to improving the body's stress ability, enhancing the body's immunity to diseases and recovery after illness. , and can delay the physiological process of human aging. So as to achieve the effect of preventing and curing diseases and prolonging life.

Physical activity is also associated with skin beauty. It can enhance the blood circulation of the skin, promote the expansion of the cross-sectional area of ​​blood vessels, facilitate blood flow to the extremities, increase the blood flow of skin capillaries, make the skin get more nutrition, increase the ability of oxygen absorption and perspiration, and activate the metabolism of the skin. At the same time, blood oxygen content increases during exercise, and cells throughout the body, including skin cells, receive more oxygen and nutrients. In addition, exercise can increase the temperature of the skin, which is conducive to the synthesis of collagen fibers in the skin, promotes the storage of water in skin cells, prevents dry skin from wrinkling, and makes the skin look plump, delicate and moist.

Exercise one hour a day, work healthy for fifty years, and live happily for a lifetime. Each of us should pay attention to and strengthen physical exercise so that we can have a better tomorrow.

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