According to the investigation of urban air pollution by environmental experts, the pollutants in urban air in China are mainly sulfur dioxide, carbon monoxide and carbon dioxide released by coal burning, which can lead to human respiratory diseases. In winter morning, the low surface temperature and high sky temperature often lead to inversion phenomenon, which makes the atmosphere stop convection. There is also the tail gas emitted by automobiles, which contains pollutants such as nitrogen oxides, hydrocarbons and lead. All kinds of harmful substances gather on the ground and cannot spread to high altitude, so the deposition stays in people's respiratory tract, which makes people inhale more smoke and toxic gases. At this time, if people get up early to exercise, it's just a loss. In this environment for a long time, their physique has not increased, but most of them have diseases such as fatigue, dizziness, pharyngitis and tracheitis, which are harmful to their health. Therefore, medical experts believe that it is more appropriate to go out for exercise around 10 in the morning. This is because the sun shines on the ground, which makes the atmosphere begin to convection up and down, the polluted air spreads to the upper air, the inverse increase of temperature disappears, the air on the ground becomes clean, and the harm to people is reduced.
Many people know that life lies in sports, but people living in cities should pay attention to the fact that sports are closely related to the environment and seasons. If you exercise in polluted air, you will not only fail to achieve the purpose of exercise, but also increase the harm to your health.
Winter exercise is just the right time, and physical exercise can improve 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. Outdoor physical exercise in winter is constantly stimulated by cold air.
Antibodies against diseases in the blood increase, and the body's resistance to diseases increases. Physical exercise and sunshine in winter make up for the lack of sunshine. Ultraviolet rays in sunlight can not only kill people's skin and clothes.
Viruses and germs in the world have disinfection effect on 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. The benefits of winter exercise
There are many, and there are many winter trainings. Generally, long-distance running, martial arts, ball games, skipping rope, kicking tendons and jumping rubber bands are used. This can be flexibly mastered by choosing different projects according to personal hobbies.
So, what should we pay attention to in winter physical exercise?
Beware of sports injuries. In winter, under the stimulation of cold, the viscosity of human muscles and ligaments will increase, which will reduce the elasticity and extensibility of muscles and the physiological activities of each joint. Therefore, you must pay attention before each exercise.
Be fully prepared. To prevent damage.
Breathing methods must be proper. It is cold, windy and dusty in winter. Therefore, don't take a big breath during exercise, but use the method of nasal cavity or nose-mouth mixed breathing to reduce the adverse stimulation of cold air on the respiratory tract.
Prevent colds and frostbite. In winter sports, clothes should be increased or decreased according to the change of outdoor cold. For exposed hands, face, nose and ears, besides rubbing and wiping frequently to promote local blood circulation, appropriate preventive measures should also be applied.
Cream, anti-cold cream, grease, etc. Prevent skin frostbite.
Pay attention to sensory hygiene. It is windy and foggy in winter, and the air pollution on the ground is getting more and more serious. So it is not suitable for outdoor sports in windy and foggy weather.
There are also requirements for diet:
1. Drink plenty of water. Get up early in the day, 10 am, 3pm and before going to bed. Take the initiative to drink water, even if you are thirsty, and boiled water is the best.
2, pay attention to the appropriate mix of coarse grains and vegetables and fruits. These foods are rich in vitamins, minerals and dietary fiber. It is beneficial to keep out the cold in winter, prevent constipation and protect cardiovascular health.
3. Drinking less alcohol, especially alcoholic beverages, can not only enhance the body's ability to keep out the cold, but also dilate skin blood vessels, leading to a drop in body temperature.
4. Non-smoking nicotine will make the blood vessels of limbs contract, so that hands and feet can't get enough heat.
As the saying goes, "move more in winter and get sick less;" Lazy in winter, drink a bowl of medicine. "Students must exercise more, love sports, winter sports have many benefits, moderate exercise!