Running between 9-10 am and 6-7 pm is the best, which can play a role in exercising and promoting physical health. Between 9-10 a.m., avoiding the time period of low temperature in the morning, and the air quality is relatively good, suitable for running exercise, and at the same time reduces the incidence of gastrointestinal discomfort caused by running immediately after breakfast, which is beneficial to health. Between 6-7 p.m., the outdoor temperature is suitable, the body’s energy is relatively strong, appropriate running exercise can promote metabolism, improve the physiological function of the circulatory system, help promote night sleep, improve the quality of sleep. It is recommended to control the amount of exercise when running to avoid excessive exercise and excessive fatigue, which may lead to discomfort. After running, you should take a proper rest, drink some warm water or juice to supplement water and nutrition, do not drink cold water to avoid inducing gastrointestinal symptoms.