Swim prime time is 40 minutes and takes you into science

ore and more people are incorporating swimming into their fitness routine. However, many people often enter the pool, will spend hours in the water, in fact, this is wrong, the golden time for swimming should be 40 minutes.
40 minutes of exercise can achieve a certain exercise effect, but also will not make people too tired. Glycogen, which is stored in the muscles and liver of the body, is the main substance that provides energy when swimming. For the first 20 minutes, the body relies mostly on calories from glycogen; In another 20 minutes, the body will break down fat for energy. Therefore, for people with the purpose of losing weight, 40 minutes can play a role in losing weight.
In addition, the water in indoor swimming pools contains chlorine, and when chlorine interacts with sweat, it forms nitrogen trichloride, which can easily damage eyes and throat. A new study in the United States shows that frequent access to chlorine more swimming pools, and the harm to the body, far outweigh the benefits of swimming to the body, but the control of swimming time can avoid this harm.

Finally, we should remind everyone that because water is a good heat conductor, the thermal conductivity is 23 times that of air, and the human body loses heat in water 25 times faster than in air. If people soak in water for too long, the body temperature drops too fast, there will be blue lips, white skin, shivering phenomenon.

Therefore, beginner swimmers should not stay in the water for too long each time. Generally speaking, 10-15 minutes is the best. Before entering the water, warm up exercises should be done first, then shower the body with cold water, and wait until the body ADAPTS to the water temperature before entering the water.