According to a survey, some people with pulmonary heart disease took part in winter swimming, while others did not. /kloc-after 0/5 years, the indexes of heart and lung function of people who participated in winter swimming did not change, while those who did not participate in winter swimming suffered from heart failure many times, and some of them "went west". Through the function test, it is found that frequent participation in winter swimming can make people's cardiopulmonary function young 15 years old. As for other functions, in the past 30 years, there have been special studies at home and abroad: winter swimming enhances human immune function, it can reduce blood fat and prevent it, it has a two-way regulation of blood pressure, it enhances neuroendocrine regulation, it enhances bone density, and so on.
■ Winter swimming varies from person to person.
It is generally believed that except for serious organic, acute and chronic infectious physical weakness, female menstrual period and other reasons, you can participate in winter swimming. The latest research shows that cold ice water during winter swimming has no side effects on children's growth and development; Pregnant women taking part in winter swimming have no adverse effects on the fetus. But in fact, winter swimming seems to be more common among middle-aged and elderly people. In this winter swimming group, there is a saying called "60 swim, 70 swim carefully, 80 stop swimming". Of course, this is also relative. There are many people who are in good health and have no interest. They are over 80 years old and continue to swim in winter.
Because winter swimming is under extremely cold special conditions, it requires higher human and physical conditions. Some people who don't have a physical examination and don't know the details of their health want to take part in the winter swimming, so it's better to take it easy.
■ Winter swimming is a must
The quantity and degree of winter swimming is the core of scientific winter swimming. Different from ordinary swimming, winter swimming pays attention to speed and distance by virtue of personal physical strength and skills. Winter swimming pays more attention to swimming time in the water. Although there are great differences in age, physique and skills, there is little difference in the length of swimming in cold ice water. The purpose of winter swimming is to have fun, not to challenge the limits. According to most people's experience, swimming in ice water 1 min, swimming in water at 2 degrees Celsius for 2 minutes and swimming in water at 3 degrees Celsius for 3 minutes is appropriate. When the water temperature is above 10 degrees Celsius, it is already spring and March, and the peach blossoms are in full bloom, so you can be free.
There is a strange phenomenon among winter swimmers. Everyone has his own "degree". How long you swim, even how many times you paddle in the water, is quite strict. This "degree" is formed in the long-term practice of people who have been swimming in winter for many years, and it is very conscious and serious to operate. This characteristic of individual adaptability is based on physiological science and biochemical science. Violating the rules of individual winter swimming may deviate from the purpose of fitness and entertainment.
■ Winter swimming is a must
Participate in winter swimming and advocate a gradual transition from summer to autumn to winter. This is because both psychological endurance and physical adaptability have a process. Some people will be surprised to see people swimming in icy water, while those who swim in winter are full of joy and pride. Sudden cold will make ordinary people catch cold and have diarrhea, but people who swim in winter are fine. This is because people who are used to winter swimming have a cold and the receptors of monocytes become inert; A large amount of corticosterone secreted by adrenal gland in stress response will not inhibit but promote monocytes to release more cytokines. Cytokines can stimulate the immune function of the body. This is one of the important mechanisms of winter swimming fitness. Winter swimming addiction is an instinctive maintenance of people's acquired acclimatization ability. Mountain climbers are addicted to mountain climbing, and dancers are addicted to dancing. The reason is the same. People who are used to winter swimming don't swim for two days, and their whole bodies are tight; If you don't swim for five days, you will feel a little cold in the water. Once the environment changes and participation stops, the acquired adaptability will gradually disappear.
The hardest time for winter swimming is 20 or 20 days before freezing. This is the most testing time. After this period of time, there is no need to be afraid of "thousands of miles of ice, Wan Li snow".
■ You are insisting.
Like other fitness, the fitness effect of winter swimming lies in persistence. Sudden and intense physical exertion can not achieve the effect of fitness, and occasional colds may also cause harm to the body. That winter swimming method is against science and is not desirable. One of the reasons is that a large amount of corticosterone secreted by strong stress will inhibit the synthesis and release of cytokines, reduce the trigger factors of immune function and reduce the body's immunity. In addition, it may cause other injuries to the body. Winter swimming is not a war, so you can't make a surprise attack.
The comfortable and warm environment contrasts greatly with the cold before winter swimming. Therefore, preparation before launching and arrangement after launching are very necessary. Limbs, shouting and venting, and so on. The auxiliary activities of winter swimmers before and after winter swimming are often amazing because of their strong regularity and conscious operation.
Of course, winter swimming at noon is the best of the day. At noon, the sun is sunny and the airflow is stable. The experience of "swimming in the snow instead of in the wind" is very valuable. Be very focused after entering the water and avoid any factors that may harm your body.
By the way, it's best not to swim alone in rivers, lakes and seas in winter. Don't rush into the water in unfamiliar waters.
Do winter swimming according to one's ability