On the morning of March 9, the airflow stagnated and there was less fresh air. It is not advisable to practice in the morning in winter, especially for middle-aged and elderly people. It is best to exercise after the sun rises to prevent colds from causing diseases.

Strong winds do not move:

It is best not to exercise in the strong wind in winter. The cold wind is more chilling. In the cold wind, the basal metabolic rate will increase 10%-20%. Increasing the amount of exercise, its heat production is also mainly used to keep out the cold, so it is difficult to achieve the effect of fitness. In addition, in the cold environment, fitness exercise is easy to cause injuries because of the stiff muscles of each joint and uncoordinated movements, which also violates the principle of fitness and entertainment.

Exercise to avoid smog:

It's best to stay at home or do some indoor sports on foggy days in winter. Because when fog and haze are serious, it will damage the respiratory mucosa and reduce its barrier and defense ability. Pathogenic microorganisms such as bacteria and viruses will take advantage of the situation and produce lung diseases.

Warm-up before practice:

It is necessary to warm up before winter exercise. Because the enhancement of metabolism in physical exercise is gradual. It takes at least five minutes for tissues and cells to change from a relatively calm inert state to an active "awake" state. Sports scientists believe that when the ambient temperature is 12.8 degrees Celsius, the mobility of fingers and toes will be affected. Therefore, warm-up before exercise is very important.