Wearing a mask for running in winter has many advantages, but no one can. People who blindly follow the trend should wear masks and need to make decisions according to their own situation. When jogging, basal metabolism and lung function are improved, and the excess air coefficient will also increase. Wearing a protective mask is not conducive to small mouth ventilation and improves the friction resistance of inhalation. After a long time, it is very easy to cause dyspnea, hypoxia and dizziness, and even affect the respiratory tract for a long time. In addition, if you wear a general protective mask when running in winter, because the sealing is not very good and the air permeability is weak, the exhaled water vapor cannot be discharged. In particular, the protective mask made of pure cotton will stick to the face when it is wet, and it will make the face colder if it is uncomfortable. Moreover, if you are a nearsighted group and wear nearsighted glasses, it will fog and affect your vision.