This paper tries to analyze the influence of physical exercise on health in foggy days or early morning before sunrise from the perspective of air quality.

According to the "Environmental Air Quality Standard" implemented in China, when encountering heavy polluted weather, the symptoms of patients with heart disease and lung disease will be significantly aggravated, the exercise tolerance will be reduced, and the healthy people will generally have symptoms. For diabetes, in addition to increasing the incidence of cardiovascular complications, outdoor exercise in foggy days will also increase the risk of respiratory tract infection, thus affecting the control of blood sugar.

In fact, when you exercise in extremely low visibility weather, you have to face the problem of safety risks. According to the Yangzi Evening News, in the early morning of February 6, 20 13, the visibility of Jurong section of Jiangsu Provincial Road 122 was less than 5 meters due to severe smog. When Wu Mou, an old man from Baitu, jurong city, was doing morning exercises, a motorcycle owner couldn't see the road clearly because of the smog, and directly killed Wu Mou.

From this point of view, outdoor sports in foggy days are not only unhealthy, but also may have life safety hazards every minute. Therefore, if the air quality is not optimistic, it is recommended that people with outdoor sports habits try to choose indoor sports.

Extended data:

In areas without smog, you don't have to worry about air quality at all, so you can run with confidence. For foggy areas, especially in autumn and winter, if you want to run in the morning, it is recommended to check the local air index first, and then consider whether to run in the morning.

Fog is more likely to appear in autumn and winter, because the surface temperature is low and the fog in the air is not easy to disperse. In addition, the temperature is low at night, resulting in the phenomenon of inversion, which makes it easier for fog to gather on the surface in the morning, and then the surface temperature rises after the sun shines, bringing the fog to the high altitude (the principle of expansion with heat and contraction with cold). So the fog is heavy in autumn and winter, and it will ease in the afternoon. The same applies to the situation of less smog in spring and summer. The surface temperature is low, and the smog at night is quickly taken away from the surface.

So the air quality will not directly affect the exercise in the morning. Just pay attention to the smog in autumn and winter. In foggy areas, check the air index before running in autumn and winter. In areas without smog, you can run safely and there is no air quality problem.

Why do you want outdoor sports in foggy days?