Swimming belongs to aerobic exercise, that is, in the process of exercise, the oxygen inhaled by the human body is equal to the demand and achieves physiological balance. The cardiovascular system includes what we know as the heart, lungs and blood vessels responsible for transporting inhaled oxygen to muscle cells. It takes more energy to overcome the resistance of water when swimming, and the oxygen consumed also increases, thus accelerating the heart rate and increasing the cardiac output. Long-term persistence will inevitably improve related organs and tissues.
2. Improve the function of respiratory system
This is similar to the principle of improving the function of cardiovascular system. Regular swimming can increase the strength of respiratory muscles and improve the function of respiratory system. The most obvious example is the value of vital capacity. The vital capacity of swimmers is much higher than that of ordinary people. According to network data, swimmers can reach 4000 to 6000 ml or even 7000 ml, while ordinary people only have 3000 to 4000 ml.
3. Improve the ability of the muscle system
Swimming is a whole-body exercise, which can promote more muscle groups to participate in metabolism and energy supply than other sports. Swimming in the water needs to overcome great resistance, and swimming is a periodic exercise. Long-term exercise can improve muscle strength, speed, endurance and joint flexibility, and improve the flexibility of muscle tissue.
4. Prevent diseases and enhance immunity
Because of the difference between water temperature and room temperature, swimming can stimulate the body's stress ability. Long-term swimming exercise can enhance the body's ability to resist cold and adapt to the environment, prevent colds and other diseases, and make the body stronger day by day. Because the body lies flat when swimming, plus buoyancy, the spine can be fully stretched, which has a certain rehabilitation effect on some spine patients.
5. It makes people feel refreshed and energetic.
Especially in the hot summer, people's emotions are easily excited, and the feeling of being sticky all over is even worse. Because swimming is a sport in the water, it can make people feel refreshed as a whole.
Extended information swimming (swimming? ) is a skill that people float upward under the buoyancy of water, and through the regular movement of limbs, the body moves regularly in water by virtue of buoyancy. Swimming can be divided into competitive swimming and practical swimming. Competitive swimming is the second largest event in the Olympic Games, including butterfly, backstroke, breaststroke, freestyle and synchronized swimming.
With the development of swimming, swimming can be divided into practical swimming and competitive swimming. Practical swimming is divided into sidestroke, diving, breaststroke, treading water, rescue, etc. Competitive swimming is divided into breaststroke, crawl, backstroke, butterfly and freestyle. The grades are: Grade III, Grade II, Grade I, Elite and International Elite.