The folk proverb says: "Wash your face with cold water to keep your beauty and health;" Brush your teeth with warm water, and your teeth like it; Soaking feet in hot water is better than taking tonic. "The benefits of a cold shower can be summarized as follows: First, it promotes blood circulation. A cold shower is called "vascular gymnastics". At the beginning of the cold shower, the skin epidermis contracts, the blood vessels contract, and a large amount of blood is compressed and then flows back to the internal organs. After a period of time, the body adapts to the temperature of water, blood vessels dilate, and blood will be redistributed and flow to the body surface. As soon as blood vessels contract, just like doing gymnastics, it can enhance resistance, prevent colds, prevent arteriosclerosis and cardiovascular diseases. Finns like to play "two days of ice and fire" in sauna, which is the reason. Second, lose weight. Cold water washing can promote gastrointestinal peristalsis, improve digestive function, and has adjuvant therapeutic effect on chronic gastritis, gastroptosis, constipation and other diseases. Third, beauty. Cold water can make blood flow to subcutaneous tissue, improve facial blood circulation, increase skin nutrition and make skin soft and elastic. Fourth, exercise a strong will. It is fun to wash cold water in summer, but it takes a lot of courage to wash cold water in winter, which is not something that ordinary people can persist in. If you can persist, this person's will and toughness should not be underestimated.
Some people say it's not good to take a cold bath. Mr. Guo from Guangzhou washed cold water in winter, which caused the intima of great vessels to tear. Fortunately, he was sent to the hospital in time and saved his life. Mr. Guo is also a frequent winter swimmer. He can swim 3 kilometers at a stretch in the Pearl River. The doctor reminded that cold and heat change greatly, and macrovascular diseases rise, just like a time bomb of the human body. Once broken, it is difficult to recover. If not treated and treated in time, the mortality rate will reach 50% in the first 48 hours, so patients with hypertension should not take a cold bath in winter. [3] It is not good to wash cold water in hot weather. Some migrant workers wash cold water and cause vasospasm and headache. The doctor said that after working in the hot season, the capillaries in the head dilate, so it is forbidden to take a cold bath at this time, otherwise the blood vessels will suddenly contract, leading to adverse consequences such as vasospasm and headache. [iv] There is another extreme example. A reeducation-through-labor worker was washed with cold water and even died. [v]
Someone summed up the disadvantages of cold shower: first, burst blood vessels. When you sweat profusely after exercise, you must take a hot bath. At this time, taking a cold bath may cause abnormal intracranial vascular function, causing dizziness, headache, black eyes and even vomiting. In severe cases, it may cause intracranial hemorrhage. [vi] Second, rheumatism. People who bathe in cold water all the year round will definitely get rheumatism in the future. Third, cervical spondylosis. Most people have some degree of cervical spondylosis. When the trigger, such as a cold shower, these hidden dangers will immediately appear, the head can't move, and the hands and feet begin to numb.
I had a stiff neck the day before yesterday, and my shoulders and back were sore, so I didn't need any strength. It's hard to look back. It happened that I washed cold water the night before, which seems to verify the disadvantages of cold water shower. I'm a little skeptical about the scientific nature of cold shower. However, I have washed cold water for two years. This is the first time I have a stiff neck, and the probability is not high. For two years, I may have a stiff neck once, even if I take a bath with hot water. It seems that my stiff neck has nothing to do with taking a cold bath.
Cold shower has both advantages and disadvantages, and disadvantages are special manifestations under special circumstances. Someone summed up the taboo of cold shower: (1) hypertension. When you have symptoms of high blood pressure such as neck pain, headache and dizziness, don't take a cold bath, because when you take a cold bath, your blood vessels will contract sharply and your blood pressure will rise. (2) heart disease. When taking a cold bath, blood rushes to the heart, which will make the heart unable to load. (3) drinking wine. After drinking, the pores of the skin will open, and when taking a cold bath, it will shrink sharply because of the cold. The impact is too great for the body to bear. (4) After strenuous exercise. After strenuous exercise, just like drinking, sweating and fever make the pores of the skin open, so take a bath immediately, and the sweat gland drainage hole suddenly closes, which makes it difficult to dissipate heat, leaving sweat in the body harmful to health. (5) Just full. After eating, blood will flow to the stomach to help digestion. If you take a cold bath immediately, blood will flow from the stomach to other internal organs, affecting digestion. (6) physical discomfort. If you have a cold, a fever or any inflammation, you are not feeling well. Because you are weak, you are not suitable for taking a cold bath.
How about taking a cold bath? I am not a medical expert, and I have no convincing answer. But I think, as long as I feel good, psychologically acceptable, there is nothing uncomfortable when I wash, and I am relaxed all over after washing, Shu Tai, a cold bath is definitely good for my health.