1, and the passing standards for boys are 3 100 ml and 3200 ml respectively.
2. The passing standards for girls are 2000 ml and 2050 ml respectively.
Healthy breathing method for improving vital capacity
1. Breathe quietly. First press the right nostril with your right thumb, take a deep breath slowly through the left nostril, and consciously imagine that the air is flowing to your forehead. When the air in the lungs is saturated, press the left nostril with the index finger and middle finger of the right hand, hold your breath for 10 seconds and then exhale. Hold down the left nostril and start again, doing it five times on each side.
2, take a deep breath, first inhale through the nostrils, so that the lower part of the lungs is filled with air. In the process of inhalation, because the diaphragm is pressed down, the chest is lifted up, the abdomen will slowly bulge, and then continue to inhale, so that the upper part of the lungs is also filled with air. At this time, the chest is enlarged and the ribs are lifted. The whole process usually takes 5 seconds, and finally hold your breath for 5 seconds. After a period of practice, you can increase the breath holding time to 10 second or even more.
The above contents refer to Baidu Encyclopedia-vital capacity and body mass index.