1. It is best to run at 6 am in spring.

2. It is best to run at 5-6 am in summer.

It's best to be around 6-7 in the morning in autumn.

Generally, it is best when the sun just appears, and it is usually around 7 o'clock in winter.

In the cold winter, many people choose morning exercises to enhance their immunity. However, outdoor fitness is not as early as possible. Relevant health experts suggest that outdoor fitness in winter should be carried out after sunrise.

The ground temperature is low before sunrise in winter, and the content of pollutants such as carbon monoxide and carbon dioxide released in the air in the morning is high. In addition, harmful pollutants such as nitrogen oxides, hydrocarbons and lead in automobile exhaust also gather on the ground. If people get up early to exercise, they will inhale a lot of smoke and toxic gases. Long-term exercise in this environment will lead to endogenous hypoxia, and may cause fatigue, dizziness, pharyngitis and other diseases, which is harmful to health.

Extended data:

If there is fog in the morning, these fogs will often suck air impurities and even bacterial pathogenic microorganisms into people's upper respiratory tract. When the human body's resistance drops, respiratory tract infection will flow to the lower respiratory tract, that is, bronchopneumonia, including lung cavity infection and even chest infection, which will further aggravate the condition, so it is best not to go out for a walk in foggy days to avoid such weather. In addition, for patients who have undergone surgery or lung cancer surgery in the past, we should pay attention, because his lungs have caused some trauma, and if we do not pay attention to the stimulation of cold air and air pollution, it will aggravate the condition.

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