As the saying goes, “winter training is three nines”, it is not easy to exercise outdoors in such cold weather, but it is valuable that some people who insist on winter swimming all year round challenge the limit and swim in Xuanwu Lake in the freezing weather. People who insist on winter swimming are attracted to it, but in the eyes of some medical experts, this kind of exercise for brave people is more harmful than beneficial. The experts interviewed by this reporter have the same opinion that winter swimming is essentially a sport, and some people hope to cure all diseases through winter swimming, which is theoretically unlikely. From the point of view of Chinese medicine, winter swimming and cold bathing are against the “natural law”. The positive side: winter swimming is “cardiovascular gymnastics” 54-year-old Ms. Liu started winter swimming in 1999, she said her previous high pressure is high, has been difficult to control, and is afraid of the cold, once in winter is shrinking hands and feet. “In the past, I also thought that winter swimming was only for strong people, and when someone recommended it to me at first, I was quite resistant. But once I insisted on it, I found that I got a lot of fun from it. Now I’m not only not afraid of the cold, but I feel that the colder I am, the more spiritual I am.” Ms. Liu said that the main reason is that there is a saying called “cardiovascular gymnastics” circulating in winter swimming activities. That is, the human blood vessels in the cold water stimulation, blood vessels will suddenly contract, thereby enhancing the speed of blood flow, so that the whole body blood flow more smoothly. The blood vessels are often contracted, as if in gymnastics, a contraction to make the blood vessels more elastic. “Think about it, such a human body which will still have high blood pressure, with high blood pressure will also be cured.” Ms. Liu said, it is not said that every day with cold water to wash the skin is good, then often winter swimming, skin stimulation, skin blood circulation, full nutrition, she feels her skin is rosy, shiny, every day is bright, others see her said she is several years younger. The 64-year-old Nanjing citizen Li, who has been a winter swimming enthusiast for more than ten years, is fond of winter swimming, “so many years of perseverance, every winter basically will not catch a cold and fever.” Master Li said, every time just to get into the water, there is still fear in the heart, because to suddenly strong stimulation, that kind of taste is still not good. So force yourself to 100 meters impact, to persevere, and now basically swim on twice a week. Li said that the weather in Nanjing is actually not cold enough to see the winter swimming competition held in the freezing snow in Harbin, which is called a great. Opposing side: Chinese medicine: winter swimming is easy to cause “cold invasion” Winter swimming is so amazing? The reporter interviewed Chinese medicine experts, but got the exact opposite statement. “I think this is against the law of nature,” Wang Ting, director of Nanjing Chinese Hospital Health Rehabilitation Center, told reporters that from the perspective of Chinese medicine health, winter itself is very cold, emphasizing the “avoid cold”, and avoid wind and cold. According to the “Yellow Emperor’s Classic of Internal Medicine”, the three months of winter, “everything collects and closes into winter”, “Yang collection, do not bother to drain Yang”, to “sleep early and get up late, in line with the closed air, must wait for daylight, avoid cold evil “. And winter swimming is prone to the phenomenon of cold invasion, which is not good for health. Wang Ting said, there is no evidence to show that the ninth winter, swimming outdoors to enhance the immune effect, but on the contrary, in the clinic, often receive a cold because of cold baths and cold or arthritis of the public. When he was very young, he was forced by his father to practice swimming for 3 years, including winter swimming. After high school, he took cold showers once every two or three days. Later, he studied under a Chinese medicine doctor and was instructed by his teacher not to take cold showers, let alone winter swimming, and started practicing qigong. “Just started practicing qigong, my feet soon grew a blister, and to squeeze words, out of the mucus two or three hours can not be squeezed.” The teacher said it was because his body was heavy with cold and dampness, and this blister was the way to drain the cold and dampness after his body got better. What is more surprising is that with the practice, his right foot later swelled up and a lot of mucus came out, “a large amount, 5 minutes without wiping, it would flow from the top of the foot to the floor.” “This foot swelling is the most drastic situation I have ever encountered in my life, and it is also the most ferocious in a series of physical improvement reactions after I practiced qigong, so that I really experienced the power of cold and dampness.” Western medicine: the function of vascular health care is not based on For the “cardiovascular gymnastics”, Nanjing Drum Tower Hospital, deputy chief physician of cardiology Song Jie also expressed his different opinions, for middle-aged and elderly patients with cardiovascular disease, the most taboo is cold stimulation in winter, and winter swimming is no different from a ” strong stimulation”. For patients with coronary heart disease, coronary artery stenosis and other cardio-cerebral vascular diseases, the oxygen consumption of the heart suddenly increases, which can easily cause symptoms such as myocardial infarction, and in serious cases, sudden death. An expert said that winter swimming can only stimulate the skin and other peripheral blood vessels, there is no theory to follow on the health care function of the heart vessels. And after the cold, it may cause disorders of internal organ function, such as intestinal stimulation easy diarrhea, gastritis attack and so on. And most winter swimming enthusiasts like to go ashore, and then take a hot shower, they think the body of a cold and a hot, conducive to the contraction and expansion of blood vessels, for the exercise of cardiovascular benefits. However, the relevant research believes that in winter, the water temperature is generally below -2℃, while the water temperature in the bathhouse is often above 35℃, and the difference in water temperature is also about 40℃. Hot and cold, such a large temperature difference is very difficult for the body to adapt. There are actually many ways to exercise in winter, winter swimming is not the only choice, jogging, brisk walking, etc. are very good exercise methods. And the most important thing is to warm up when you do aerobic exercise in winter, because the weather is cold, people’s muscles and joints are easy to stiffen, so warm up to be adequate. And winter in the exercise also pay attention to not sweat profusely, so sweat and then blown by the cold wind, it is also easy to get cold. Whether it is winter swimming or cold shower must be measured, gradual, and long-term persistence, otherwise not only is not beneficial, but also damaging to the body.