1) research shows that the human immune system is the weakest in the early morning, and the incidence of stroke and heart disease is significantly higher than other time periods;
2) Photosynthesis of plants is a process of emitting oxygen, while at night, plants emit carbon dioxide. In the morning, when the carbon dioxide content in the air is the highest, it is not suitable for running;
3) The physiological curve of human body shows that it is most suitable for exercise at 4~6 pm, when the physiological indexes of human body reach the optimal value and exercise gets twice the result with half the effort;
4) If the landlord wants to run in winter, he will run at night. It is very uncomfortable to inhale air directly into the lungs in the morning in winter night.
It is the protection of organs when it is hot in the afternoon. Running at night is not without harm,
The driver has been driving all morning, and the air pollution is the most serious in the afternoon. Try to find a place with fewer cars and more plants to run.