The health benefits of swimming:
1, swimming plays an important role in improving the cardiovascular system, and the stimulation of cold water can promote blood circulation through thermoswimming and metabolism regulation; In addition, the pressure and resistance of water also play a special role in the heart and blood circulation. When swimming on the water, the water pressure on the body has reached 0.02-0.05 kg per square centimeter. When diving, with the increase of depth and the change of physical conditions, the pressure will increase, and the speed of swimming will also increase the pressure load. The muscle tissue of atrium and ventricle can be strengthened, the volume of heart cavity can be gradually increased, and the beating times of heart can be reduced. This can preserve the activity of the heart, but it can improve the whole blood circulation system. At rest, diastolic blood pressure increases and systolic blood pressure decreases, so the blood pressure value becomes more favorable. The elasticity of blood vessels has also improved.
2. The metabolic process and the economization of cardiovascular system work are inseparable from a large amount of oxygen supply. However, because water compresses the chest and abdomen, it is more difficult to inhale. Someone has done special experiments. When swimming, people's chest is under the pressure of 12- 15 kg of water, so in order to get enough oxygen for the body, the respiratory muscles must constantly overcome this pressure; In addition, when swimming, exhalation is generally done underwater, and the density of water is much higher than that of air, so it is necessary to use force to exhale, so that both inhalation and exhalation can increase the contraction force of respiratory muscles, thus enhancing the function of respiratory system and increasing vital capacity. The average healthy person's vital capacity is 3000-4000 ml, while those who often swim can reach 5000-6000 ml.
3. In the process of swimming, due to the stimulation of water temperature, the body wants to ensure enough temperature. Skin blood vessels play an important regulatory role. Stimulation of cold water can make skin blood vessels contract and prevent heat from spreading outward. At the same time, the body will intensify the generation of heat, dilate the blood vessels of the skin and improve the blood supply of the blood vessels of the skin, so that long-term exercise can strengthen the blood circulation of the skin.
4. Enhance myocardial function
5, enhance resistance, the water temperature of the swimming pool is often 26 degrees to 28 degrees, soaking in water dissipates heat quickly and consumes a lot of energy. In order to supplement the heat emitted by the body as soon as possible and meet the needs of cold and heat balance, the nervous system reacts quickly, accelerating the metabolism of the human body, enhancing the adaptability of the human body to the outside world and resisting the cold.
6, lose weight, when swimming, the body is directly immersed in water, which not only has great resistance, but also has very good thermal conductivity and fast heat dissipation, so it consumes more calories. Like a boiled egg, the cooling rate in air is far less than that in cold water. Experiments show that the heat consumed by a person running in a standard swimming pool for 20 minutes is equivalent to running at the same speed 1 hour on land, and the heat consumed by staying in water with 100 minutes is as high as 100 kcal, which is equivalent to being in air with the same temperature. In addition, swimming diet can avoid sports injuries of lower limbs and waist.
7, bodybuilding, swimming, usually use the buoyancy of water to lie prone or supine in the water, relax and stretch the whole body, so that the body can get comprehensive, symmetrical and coordinated development, so that muscle lines are smooth. Exercise in water reduces the impact of the ground on bones, reduces the probability of bone aging, and the joints are not easy to deform. The resistance of water can increase people's exercise intensity, but this kind of intensity is very soft, which is different from the equipment training on land. It is easy to control the training intensity in aerobic area, and it will not grow stiff muscle blocks, which can make the whole body lines smooth and beautiful.
8. Strengthen lung function. Breathing mainly depends on the lungs. The strength of lung function is determined by the strength of respiratory muscle function. Exercise is one of the effective means to improve and increase vital capacity.