There are three types of running time: morning running, night running and night running. Each has its own advantages and disadvantages. You can choose the right time according to your own time and physical condition. Morning running: It can make you energetic all day, but it will increase the burden of cardiovascular and cerebrovascular, and the air quality is worrying. Running at night (4 to 6 o'clock): After a day's work, the body has fully warmed up, but running at this time will delay the dinner time and easily cause indigestion or gastroenteritis. Night running (after 7 o'clock): The weight loss effect is good, but it is easy to get cold.