The best exercise time varies from season to season. This is because the degree of urban air pollution changes obviously with seasons and time. Environmental health experts have studied the relationship between air hygiene monitoring and air pollution and lung cancer in big cities for many years, and proved that the air is cleanest in summer and autumn, and the air pollution is the most serious in spring and summer. In a day and night, the air is cleanest at noon and afternoon, and the air pollution is heavier in the morning (6-8 o'clock) and at night (5-8 o'clock). Among them, the first pollution peak is around 6 am in summer and around 7 am in winter; The second pollution peak is around 7 pm in summer and 6 pm in winter. If you master these characteristics of air pollution, you can choose the appropriate exercise time.
When exercising in the first two months of winter and spring, you should avoid the peak of air pollution at 6-7 am and around 6 pm. In summer and autumn, the sun comes out early, so it is best to exercise around 5 am. If conditions permit, we should choose 9- 10 in the morning and 3-4 in the afternoon for physical exercise. At this time, the air cleanliness is the best, which can ensure the fresh air and achieve better fitness effect.
2. What climate is not suitable for outdoor sports?
As the saying goes, "practice for three or nine days in winter" and "practice for three days in summer" encourages people to persist in outdoor physical exercise in the coldest and hottest days, so as to improve their adaptability to cold and heat and improve their health. But under the following climatic and environmental conditions, it is not suitable for outdoor sports.
In winter, when there is a cold wave or storm, the temperature drops by 5C? Above, or when it is windy; After rain or snowfall, when the water in the activity place is slippery; In hot summer, the temperature is 37C? Above time; In addition, in foggy days, harmful gases in the air are not easy to spread and the pollution is serious. At the same time, low air pressure can make people feel difficult to breathe, sweat is not easy to evaporate, fog visibility is very low, and accidents are prone to occur. Therefore, it is not appropriate to exercise outdoors. In these cases, we should do aerobics, jump rope, run in situ and other activities indoors to keep up with physical exercise.