Because exercise is to keep fit, as for hair loss, it is mostly caused by pressure or physical reasons, but exercise itself can release some pressure, so it should not be caused by pressure.

It is understood that 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 may lead to fatigue, dizziness, pharyngitis and other diseases, which are harmful to the body.

It is best not to exercise outdoors in foggy mornings. Due to air pollution, fog contains many substances harmful to human body. When people do strenuous activities such as long-distance running in foggy days, some sensitive parts of the body will come into contact with these harmful substances and be inhaled in large quantities, which may easily cause tracheitis, laryngitis, conjunctivitis and allergic diseases. So on foggy mornings, we can do morning exercises indoors instead of going outdoors.

In order to avoid affecting the function of digestive system, it is best to do physical exercise more than half an hour after meals. Physical exercise after dinner is worth advocating, because most people in China eat more after dinner, and most people just watch newspapers or TV programs after dinner, and seldom do physical activities, which is very unfavorable for lowering blood sugar and losing weight.