Generally speaking, you should breathe through your nose at the beginning of long-distance running or when you run slowly, especially when you are practicing long-distance running or running against the wind in winter. Because there are rich blood vessels in the nasal cavity, the temperature of the air passing through can be increased; The nasal mucosa secretes liquid, which can increase the humidity of the air passing through it; Nasal hair and nasal mucosa secretions can also block and remove dust and bacteria, which has a certain protective effect on the respiratory tract.

Breathing through the mouth can inhale more air, but a large amount of cold air enters the trachea and throat, which is easy to cause cough, tracheitis and abdominal pain. Through oral inhalation, dust and bacteria in the air will be directly inhaled into the body, which is easy to cause other diseases.

Extended data:

Pay attention to the handling of "bars" in long-distance running. Due to the inertia of internal organs, the oxygen supply temporarily lags behind the needs of muscle activity, and a large number of metabolites produced by muscle activity cannot be transported away in time. Therefore, after running for a period of time, there will be different degrees of breathing difficulties, chest tightness, limb weakness, running speed decline and other phenomena, it is difficult to continue running, this is the so-called "pole."

Pole is a normal physiological phenomenon in long-distance running, and its reaction degree is closely related to training level, exercise intensity and adequacy of warm-up activities. Candidates with high training level have strong adaptability to internal organs and nervous system, and the "pole" phenomenon appears late, with a light degree and short duration. Adequate preparation activities can alleviate the reaction degree of "Pole".

When the "pole" happens, we must persist in running with tenacious perseverance. It is necessary to strengthen the depth of breathing and adjust the running speed appropriately, so that the "pole" phenomenon will be alleviated and the "second breath" will appear.

People's Network-National Fitness Lecture Hall How to breathe when running is scientific.