First, the prime time for swimming should be 40 minutes, 1. Keeping the swimming time around 40 minutes can not only achieve a certain exercise effect, but also make people feel overtired. In swimming, glycogen stored in human muscle and liver is the main substance to provide energy. In the first 20 minutes, the body mainly relies on the heat provided by glycogen to maintain physical fitness, and in the last 20 minutes, the body will decompose fat to provide this energy. For people who want to lose weight, the prime time should be 40 minutes to achieve a good weight loss effect.
2. Research shows that water is a good heat conductor, and its thermal conductivity is 23 times that of air. Obviously, the speed of heat dissipation in water is much faster than that in air. Soaking in water for too long, and the temperature of the human body drops too fast, will lead to the phenomenon of blue lips, white skin and trembling face.
Generally, the water in indoor swimming pools contains chlorine, and the human body will secrete sweat acid when sweating. When chlorine in water interacts with human sweat acid, it will produce nitrogen trichloride, which is very easy to damage eyes and throat, so it is necessary to control the time in water to avoid such damage.
Second, swimming precautions 1, the time period suitable for swimming is generally 7: 00 am, 3: 00 pm and 8: 00 pm. The human body will be in an ideal state of exercise during these periods, which is also because during these periods, the human body has stored enough capacity and there is no extra burden on the stomach.
2. Pay attention to the water temperature when swimming. Summer and winter are the seasons for many people to swim. The water temperature for swimming in summer should be kept below 35℃. If the water temperature is too high, it is easy to get heatstroke. It is best to keep the water temperature above 14℃ in winter swimming, and it is recommended to swim indoors.
3. Swimming time should not be too long. For beginners, the time in the swimming pool should generally be 10 to 15 minutes. For skilled swimmers, the golden swimming time should be 40 minutes, while the recreational swimming time should be controlled within 2 hours. Whether swimming or paddling, stretching and warm-up exercises should be done before entering the water, and the body should adapt to the water temperature before entering the water.
4. Don't swim after drinking. Alcohol can paralyze people's brains. Alcohol can inhibit the normal physiological function of the liver and hinder the transformation and storage of glycogen in the body, thus causing accidents.
The above is what the craftsman introduced to you about the best time for swimming every day and the precautions for swimming. I hope it helps you. If you know more about swimming, please share it in the comments section.