Participating in physical fitness activities in winter can not only exercise and enhance physical fitness, but also exercise strong will, not afraid of cold, improve the body's cold resistance and prevent various diseases.
In winter physical exercise, due to the continuous contraction of muscles, accelerated breathing, vigorous metabolism, the body produces more heat. At the same time, it also enhances the excitability of the cerebral cortex, makes the thermoregulation center regulate the body temperature sensitively and accurately, and improves people's ability to keep out the cold. Therefore, people who insist on winter exercise have 8- 10 times stronger cold resistance than ordinary people.
Physical exercise in winter is mostly carried out outdoors, constantly stimulated by cold air, and the hematopoietic function of human body has changed obviously. Red blood cells, white blood cells, hemoglobin and antibodies against diseases have increased in the blood, and the body's resistance to diseases has increased. Therefore, people who insist on winter exercise rarely suffer from anemia, colds, tonsillitis, tracheitis and pneumonia. As the saying goes, "move more in winter and get sick less;" Lazy in winter, drink a bowl of medicine more "is the truth.
Exercise in winter, accept the sunshine and make up for the lack of sunshine. Ultraviolet rays in sunlight can not only kill viruses and germs on human skin and clothes, but also disinfect human body. It can also promote the absorption of calcium and phosphorus by human body and contribute to the growth and development of bones. Especially for the growing teenagers, it is more important to take part in outdoor sports.
Physical exercise in winter can also accelerate blood circulation and increase the oxygen supply to the brain, which has a positive effect on eliminating fatigue caused by long-term work of the brain, enhancing memory and improving learning efficiency.
There are many benefits of children's winter exercise, and there are also many items of winter exercise. Outdoor exercise can promote the development of lung function, increase vital capacity and enhance the defense ability of respiratory tract. Therefore, children should be encouraged to be more active in the outdoor environment, breathe fresh air, enhance the regulation function of the central nervous system on body temperature, and improve their ability to keep out the cold. The exercise plan recommended by experts is: exercise 5 days a week, every day 1 hour, mainly middle and long distance running, supplemented by ball games, skipping rope and other items acceptable to children.
Second, children's physical exercise to avoid injury
Dr. Dai is a senior expert in orthopedics at Children's Hospital. In an interview, she revealed such a message: children in modern cities are much less likely to be injured in their daily lives than they were 20 years ago; However, the proportion of injuries in sports has greatly increased. "For example, in Guangzhou, few children were injured and sprained by skiing and grass skiing. Now, there are too many families who are keen to experience' ice and snow swimming'. Many parents think that skiing in winter is the first choice to cultivate children's brave temperament, and it is also a sign that family life has entered the middle class.
As a result, a small number of children have fractures, frostbite and other accidents because they don't know how to protect themselves during exercise. The popularity of roller skates and roller skates in children has also brought some security risks. Dr. Dai believes that there is nothing wrong with encouraging children to exercise more and travel more, but it is also important for children who know nothing about sports injuries to instill sports protection knowledge. Otherwise, in the event of an accident, not only the children and parents will suffer, but also the inner world of the children will be cast a shadow-will you dare to gallop on the sports ground carefree next time?