When exercising, clothes should not be exposed at the waist or bare back. Only when the skin temperature is higher than the ambient temperature can the skin be cooled by increasing radiation and conducting heat dissipation. In hot summer, the highest temperature is generally close to or higher than 37℃, so the skin can't dissipate heat, but absorbs heat from the external environment, so it will feel hotter if you are shirtless or show your back in summer. Moreover, bare-chested activities in the sun, strong ultraviolet radiation directly on the skin, will also cause skin diseases.
Cooling down after exercise should not be too fast. When sweating profusely, many people think that it is refreshing to uncover clothes and blow them in front of a fan, or blow them directly under supercooled air conditioning, and turn on the tap to let cold water go straight to the body to achieve the effect of "rapid cooling". As we all know, this "quick cooling" method often makes you happy for a while and uncomfortable for a few days.
This is because after exercise, human pores are enlarged, and after being suddenly stimulated by cold, the pores shrink rapidly. This is extremely harmful to the body, vulnerable to cold pathogens, and even causes various diseases.
It is not advisable to drink too much water during exercise. If you drink too much water, it will cause symptoms such as stomach muscle spasm and abdominal pain. After a few minutes of strenuous exercise, you should properly replenish water.
It is not advisable to supplement pure water after exercise, because it contains almost no salt and minerals discharged by human sweating. When people do strenuous exercise at high temperature, they sweat a lot, which leads to the loss of water and salt in the body. If you drink plenty of water and don't replenish salt in time, the concentration of sodium chloride in the blood will decrease and the muscle excitability will increase, which will easily cause muscle spasm and pain.
So before training, you should add enough water and salt; Pay attention to the alternate movement of all muscle groups in the whole body during exercise, so as to avoid overloading local limbs by exercising only local limbs.
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