The best time for morning running is usually related to the season, weather and climate. In autumn and winter, it is usually more appropriate to run in the morning around 9:00 a.m. In spring and summer, it is usually more appropriate to run in the morning around 7:00 a.m. Morning running is a healthy and active way to exercise and is loved by the public. In summer, the day is long and the night is short, and the sky gradually lights up around 6-7 am, when the human body is most energetic due to the action of adrenaline, which is more suitable for morning running. In autumn and winter, the dawn time is late and the air is wet and cold in the early morning, so it is best to start running in the morning at around 9 o’clock. At this time, sunlight, plants began to photosynthesis, after absorbing the deposited carbon dioxide overnight, began to release oxygen, at this time choose to run in the morning, the air is clear, but also very comfortable. Of course, if it is raining or foggy weather, the time will be another consideration. People should pay attention to safety when running in the morning, and do a good job of stretching before running to avoid running damage to muscle ligaments.