A passage, say the role of swimming!
Improve the function of the respiratory systemA major characteristic of water is its poor compressibility. Because water is 800 times more dense than air, people are much more stressed in the water than in the air. This is why beginner swimmers feel difficult breathing in the water. Because the pressure in the chest and abdomen increases in the water, it forces the respiratory muscle to breathe with greater strength. Therefore, regular swimming can increase the strength of respiratory muscles and improve the function of the respiratory system. One of the most obvious examples is the value of vital capacity. The swimmer's lungs can reach 4000 to 6000 milliliters, or even 7000 milliliters, compared with 3000 to 4000 milliliters for the average person.
Improving cardiovascular functionThe cardiovascular system includes the heart, lungs, and vessels responsible for delivering inhaled oxygen to the muscle cells. When swimming, to overcome the resistance of water, you need to use more energy to speed up your heart rate and increase your cardiac output. Long term swimming exercise, exercise heart volume was increased, strong cardiac contraction, quiet heart rate, stroke volume increased, vascular wall thickening, increased flexibility, improve the efficiency of the cardiovascular system.In addition, when swimming, the body is in a supine position, the water pressure on the skin and form a massage effect, therefore, the limbs, especially the blood of the lower limbs, the return to the heart is easier than on the ground upright state. Moreover, the water resistance makes it difficult for muscles to carry out explosive force like land. These characteristics are very suitable for middle-aged and elderly people to exercise. It can not only enhance the physique, but also cause unexpected accidents due to too much exercise.
Swimming is one of the most popular fitness programs. Proper swimming exercises can not only bring about psychological pleasure, but also improve the function of the cardiovascular system, strengthen the Constitution and improve the coordination. Many sports are easy to cause strain or damage to the body, but swimming is the lowest strain and injury rate of sports activities. Therefore, swimming is a good exercise that can be done for life.
Ability to improve the muscular systemSwimming is a fully involved exercise, which can mobilize more muscle groups than other sports to participate in metabolic energy supply.Although swimming can not build strong, raised muscles, it can improve the strength and coordination of many muscles, especially the trunk, shoulder girdle and upper limb muscles. Because swimming in the water needs to overcome the greater resistance, swimming is a cyclical exercise, long-term exercise can make muscle strength, speed, endurance and flexibility of the joints have been improved.Swimming also has a great advantage, that is, the improvement of flexibility. This allows people to continue swimming when they are unable to engage in other sports because of age restrictions. Because of the larger range of physical activity during swimming, regular swimmers will become more flexible and supple. What's more, proper swimming techniques require the muscles to stretch before they stretch, which helps improve flexibility and strength.
