Why is the water temperature in the swimming pool 27 degrees?
The temperature of indoor swimming pool is usually maintained at 26 ℃ to 29 ℃, which is the most suitable temperature for swimming. If the water temperature is 20 ℃, the heat generated by the body in the water is less than the heat emitted. The muscles and nerves on the surface of the body and limbs will involuntarily reduce the temperature to protect the internal organs from damage.
Space temperature in swimming pool: 26 ℃ - 28 ℃.
The water temperature is 28 ℃ in summer and 29 ℃ in winter.
The water temperature of the national standard swimming pool is between 26 ℃ and 28 ℃. If it is a competition, the temperature will be lower. As we all know, Bai's body temperature is 37 ℃, with a temperature difference of nearly 10 degrees. Naturally, when you first enter the water, you feel cold. Why does the water temperature in the swimming pool have to be so "low"?
Everyone has this kind of experience: whether it's swimming or playing in the water, it's cold when you just enter the water, but it may even be hot enough to sweat after playing. This is because exercise will produce heat while consuming energy, and when exercising, your metabolism will speed up and your body temperature will rise, which requires cold water to cool you down and make you feel comfortable.
If the water temperature is not lower than the body temperature, then the favorable heat radiator, water, will not work. Moreover, if you want to be comfortable when you enter the water, the water temperature will reach or exceed the body temperature. At such a temperature, a little exercise is not swimming but sauna, because warm water can't quickly take away the excessive heat generated by exercise.
Cold and hot relaxation, vasodilation, just into the water, lower than the temperature of the water will make the skin vasoconstriction, to reduce heat emission. After exercise, the heat generated by exercise will spread out and make the skin blood vessels dilate. This contraction will make the cardiovascular system which is usually not able to exercise also exercise. This is a good exercise to prevent cardiovascular disease. In addition, when it's cold, blood vessels in the skin contract, and blood flows back to important organs, such as the brain, to protect them from damage. When it's hot, the blood vessels of the skin dilate and the blood stays more on the surface of the body, so the blood flow of those important organs will naturally decrease. Brain nutrition and lack of oxygen, but also how to respond quickly? Naturally, it feels chaotic. Let muscles have a sense of strength, even a small action of the human body is completed by muscle contraction. The muscles that proclaim strength have to contract to be seen.
Cold water not only helps the blood vessels to contract, but also helps the muscles to contract, making the people who exercise in the water feel full of strength to complete the action. But if it's in warm water, it's counterproductive. Warm water, massage like pat your body, the whole body muscles will relax. Comfortable is comfortable, but if you want to move, you can get twice the result with half the effort, and people will feel very tired. Swimming in warm water is more tiring and requires more energy. And the heat brought by consuming more energy can not be taken away by warm water, which leads to people's body temperature rising all the way. In order to dissipate heat, skin blood vessels expand more, resulting in insufficient blood supply to important organs in the body. At the same time, in order to reduce the temperature, the human body will sweat a lot. It is expected that sweat evaporation will take away more heat to achieve the purpose of cooling.
However, warm water swimming not only can not complete this task, but also cause dehydration of human body. There is no way to regulate the body temperature, and it is dehydrated. Heatstroke is likely to occur (not only in summer, but also in hot baths). This is a fatal emergency. It is prone to cardiac dysfunction, unconsciousness and dyspnea. It is already critical to have these conditions on land, but even more so in water.
