I saw them wearing the professional altitude training masks, and read some introductions that they should wear disposable masks first, and then take them slowly. What's the use of wearing a mask for fitness? It can imitate altitude hypoxia training, enhance cardiopulmonary function and improve performance.

Altitude training is a method to improve athletes' endurance performance through high altitude and low oxygen environment. The plateau air is thin, and the oxygen partial pressure drops. The body needs to produce more red blood cells, heme and myoglobin to improve the oxygen uptake.

In practical application, many athletes/friends engaged in physical work (such as firefighters) in fighting competitions have pointed out that wearing masks is closer to the real competition/work environment, which can enhance concentration and overcome psychological fear. In addition, adding new training elements in time can also improve the freshness and interest of sports, break the routine and give the body new stimulation.

Extended data

Altitude training, one of sports training methods. Since 1968, the venue for the 19 Olympic Games has been set in Mexico City at an altitude of 2,240 meters. Altitude training has attracted the attention of the world sports community.

The air density in the moderate plateau is only 77% of that in the altitude plane. The oxygen content is only about 3/4 of that in the plain area, and the partial pressure of oxygen is 20-25% higher than that in the plain area. Athletes training in this environment, due to the pressure of "adjusting adaptation period", breathing frequency and heart rate are accelerated, and some oxygen dissolved in blood vessels is not easily absorbed by the body due to the influence of low pressure.

The blood vessel volume increases, the blood vessel dilates, the blood vessel wall thickens, the blood vessel thickens, and the passing blood volume increases, so as to better exercise the cardiovascular system of athletes, improve the maximum oxygen uptake and hemoglobin concentration, enhance the tolerance to lactic acid, and produce altitude acclimatization (altitude acclimatization). When we return to the plain, we will lose our acquired adaptability, and athletes will have the stress of new conditions, that is, late domestication-getting rid of habits. Altitude training before the competition has a significant effect on improving sports performance. Each training session lasts about three weeks.

Reference source: Baidu Encyclopedia-Altitude Training Method