Introduction to swimming:
Swimming is a skill that people float upward under the buoyancy of water and make their bodies move regularly in the water by virtue of buoyancy. From 65438 to the 1960s, swimming activities in many parts of Britain were quite active.
1828, Britain built the first indoor swimming pool at Liverpool George Pier. By the 1930s, this kind of swimming pool appeared in major cities in Britain. 1837, the first swimming organization was established in London, England, and held the earliest swimming competition in Britain. 1896, swimming was listed as an Olympic event.
The highest organization for swimming is the International Swimming Federation, headquartered in Lausanne, Switzerland. 1908 was proposed by the swimming associations of Belgium, Denmark, Finland, France, Germany, Britain, Hungary and Sweden.
Benefits of swimming:
Enhance myocardial function, when people exercise in water, all organs participate in it, consume more energy, accelerate blood circulation and provide more nutrition for sports organs. The acceleration of blood speed will increase the load on the heart, make the heart beat faster and contract strongly. People who swim regularly have excellent heart function.
To enhance the resistance, the water temperature in the swimming pool is often 26℃ to 28℃, so 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.
To 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. Just like a freshly 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 on land 1 hour.