How to choose physical exercise time scientifically and rationally? It is generally believed that fresh air in the morning is the best time to exercise. However, environmental health experts have verified through years of research on the air pollution monitoring of large cities and the relationship between atmospheric pollution and the incidence of lung cancer. The morning air is not new. Air pollution is heavy in the morning, evening and night. From 7:00 am to 7:00 pm, it is the peak time of pollution. At this time, carbon dioxide, benzopyrene and other toxic substances can rise several times. The reason is:
1. A large amount of smoke, dust and toxic gas discharged from various factories;
2. Exhaust gases emitted by vehicles, trains, airplanes, etc.;
3. Smoke and dust for heating boilers and small stoves in winter;
4. The green plants have not yet carried out photosynthesis, and they absorb oxygen at night and release large amounts of carbon dioxide gas.
In addition, exercise at this time, due to high humidity in the air, will affect breathing, sweat is not easy to evaporate.
The air flow is greatly affected by the vertical temperature difference between day and night. When the ground temperature is higher than high altitude, the ground air is easy to rise and the pollutants are taken to the upper air to be diluted; on the contrary, the sky forms an inversion layer, and various pollutants on the ground are The "big pot lid" does not spread easily on the ground, so in the big city's day, the air at noon and afternoon is the most "clean". Therefore, we recommend that exercise should avoid peak hours of air pollution from 6:00 to 7:00 in the morning; it is best to exercise from 17:00 to 18:00 so that fresh air can be ensured.
To sum up, how to arrange a day's exercise scientifically and reasonably? The author believes that in the morning should not exercise, the afternoon is the prime time for sports. If you want to exercise in the morning, you should use exercises, tai chi, jogging, and jogging as best. You can also do pull-ups, sit-ups, and so on. If you are running alone, you need to do preparatory activities before running. Exercise in the morning should not be too long, the amount of exercise can not be too large, the action should not be too complicated. It is not advisable to conduct intense exercise in the morning, because morning is the most clear-headed, most energetic time for work and study.
The author suggests that every afternoon exercise should be performed from 16:00 to 18:00, because it is the best time of the day and it can be used for more intense exercise. The amount of exercise is not excessive fatigue and does not affect the evening activities. . More intense physical exercise can promote blood circulation, strengthen breathing exercises, and keep the metabolism vigorous. This will greatly help eliminate fatigue and improve health during work and study throughout the day.
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