A day’s plan lies in the morning, many people like to get up and run in the morning, but the best time to run in the morning is not known by all. The best time for running in the morning is 7-9 o’clock, because at night various plants breathe, the air is rich in carbon dioxide, the air quality is poor, after 7 o’clock the sun comes out, the plants carry out photosynthesis, absorb carbon dioxide, release oxygen, the air is in a relatively fresh state, which is beneficial to human health. 7 o’clock before the temperature is mostly low, especially in autumn and winter, the body organs are not fully awake after getting up in the morning. It is easy to have cardiovascular accidents and injuries. The sympathetic nerve and vagus nerve of the body after 7:00 is finished, the body organs can effectively play a role in the health of the body, not easy to accidents.