Blowing up the lungs has existed since ancient times. Legend has it that there is a story. One summer a long time ago, a young boy was walking in the scorching sun. He was very thirsty. Just in front of the village, a man was digging a well. He went over to beg for saliva. The bearer scooped half a spoon with a ladle, and the son was about to pick it up. Unexpectedly, the bearer grabbed some grass from the haystack beside him and threw it into the ladle before handing it to the childe. The son thought, this man is really bad, but he is thirsty and has to sip while blowing grass leaves. When I got home, I told my dad, and his dad replied with a smile, fearing that you would explode with anger, and I would like to thank others in the future. Childe is awake.
During exercise, people will sweat a lot, and the body is temporarily in a state of water shortage. You can drink water in moderation at this time, such as long-distance runners, especially marathon runners, or cyclists. It's normal to drink water halfway. However, it is not advisable to drink cold water, because cold water will cause a sudden drop in the body temperature, which will have a great burden on the blood circulation of the heart, which may cause diaphragm spasm, affect the heart rhythm and even sudden death.
It's true. Drinking all kinds of frozen drinks after strenuous exercise will lead to cardiovascular functions, such as sudden contraction and extrusion due to cold stimulation, which will lead to the bursting of blood vessels or the inability of other organs to bear this sudden contraction (this principle is well known).
It can be understood that after strenuous exercise, some people have too much heat in their bodies and their lungs are very hot, and then suddenly they pour ice water and react directly to crack. It is unreasonable for a woman to suddenly pour ice water on a stone on a hot day.