Views:15 Author:Site Editor Publish Time: 2020-12-03 Origin:Site
More and more people include swimming in their fitness plans. However, many people often spend several hours in the water as soon as they enter the swimming pool. In fact, this is wrong. The prime time for swimming should be 40 minutes.
40 minutes of exercise can achieve a certain exercise effect, and will not make people too tired. When swimming, glycogen stored in human muscles and liver is the main substance that provides energy. In the first 20 minutes, the body mainly relies on the calories provided by glycogen to maintain energy; in another 20 minutes, the body will break down fat to provide energy. Therefore, for people who aim to lose weight, 40 minutes can play a role in losing weight.
In addition, the water in the indoor swimming pool contains chlorine. When chlorine interacts with sweat, nitrogen trichloride is formed, which can easily damage the eyes and throat. The results of a recent study in the United States show that frequent visits to swimming pools with more chlorine will cause physical damage far exceeding the benefits of swimming, but such damage can be avoided by controlling swimming time.
Finally, I would like to remind everyone that because water is a good heat conductor, the thermal conductivity is 23 times that of air, and the human body dissipates heat 25 times faster in water than in air. If a person is immersed in water for too long and the body temperature drops too fast, the lips will become blue, the skin will turn white, and chills will occur.
Therefore, those who are new to swimming should not stay in the water for too long each time. Generally speaking, 10-15 minutes is the most appropriate. Before entering the water, do warm-up exercises, then shower your body with cold water, and wait until your body adapts to the water temperature before entering the water.