1. Regulating blood pressure: Exercise and fitness have a good regulating effect on blood pressure, which can obviously improve the viscosity of whole blood and plasma, change the excitability of autonomic nerves, increase the permeability of blood vessels, and play a role in dredging blood vessels.
At the same time, through exercise, the tension of cardiac vagus nerve is enhanced, while the tension of cardiac sympathetic nerve is relatively reduced, and the heart rhythm is obviously slowed down, thus reducing the burden on the heart, greatly reducing the oxygen consumption of the heart and avoiding the occurrence of cardiovascular diseases.
Second, improve breathing: people who often participate in physical exercise can strengthen the range of diaphragm up and down activities, increase the negative pressure of pleural cavity under inhalation, help improve cardiopulmonary circulation, increase the effective ventilation of alveoli, and make gas exchange good. Reduce the consumption of oxygen, reduce the energy consumed by breathing exercise per unit time, and meet the body's demand for oxygen.
The digestive system to improve gastrointestinal function is under the direct control and regulation of autonomic nervous system for physiological activities. Exercise gradually increases the range of activities of transverse abdominis muscle, artificially changes the excitation intensity of sympathetic and parasympathetic nervous systems, thus regulating the function of digestive system; At the same time, it can increase saliva secretion, stimulate appetite and smooth stool, which is beneficial to the prevention and treatment of digestive tract diseases.
Third, promote metabolism: human blood lipids mainly include cholesterol, triglycerides and phospholipids. Hyperlipidemia can easily harden people's arteries. Exercise can improve substance metabolism and reduce cholesterol and triglyceride, which is of positive significance for the prevention and treatment of arteriosclerosis. At the same time, fitness exercise can also improve the hormone level in the body, delay physiological aging and alleviate pathological changes.
Fourth, stimulate the nerves: people who exercise regularly can produce a virtuous circle, that is, the more they practice, the more they love to practice. Therefore, high spirits and cheerful spirits have a benign stimulating and regulating effect on the cerebral cortex. After years of experiments, it is shown that exercise can increase the excitability of vagus nerve and decrease the excitability of sympathetic nerve, thus improving the function of nervous system.
Five, improve human immunity: In recent years, clinical practice has proved that exercise can improve the physiological effects of human immunoglobulin, lymphocytes and complement, thereby improving the body's immunity, enhancing physical fitness and prolonging life. Through exercise, you can also promote the body to produce interferon. Interferon is a powerful physiological antiviral substance, which has the functions of anti-tumor, infection control and immune regulation. ?
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