You can judge your vital capacity by the duration of your exercise and the degree of shortness of breath during running. Generally speaking, the longer you exercise, the greater your vital capacity, and vice versa. The shorter the breath when running, the smaller the vital capacity. Similarly, if you breathe gently, your lung capacity will increase.
Second, test with instruments.
You can judge your vital capacity through the instrument. If you don't have such an instrument, you can also try to download a software for spirometry in your mobile phone.
Third, inhale and exhale
You can judge your vital capacity by the depth of your inhalation. Generally speaking, the deeper the inhalation, the greater the vital capacity, while the longer the exhalation time, the greater the exhaled gas density, which naturally means the greater the vital capacity. This is the easiest way to test your vital capacity.
Extended data
Vital capacity varies with gender and age, and males are significantly higher than females. Before the age of 20, the vital capacity gradually increased with age, but it did not increase obviously after the age of 20. The vital capacity of adult males is about 3500 ~ 4000 ml, and that of adult females is about 2500 ~ 3000 ml.
The vital capacity mainly depends on the expansion and contraction of the chest wall. The lung capacity decreases with age, by 9% ~ 27% every 10 year, but the lung capacity of people who insist on physical exercise for a long time can still remain normal.
Physical exercise can obviously improve lung capacity, such as doing some bare-handed exercises such as chest expansion and arm shaking, and insisting on running, swimming, playing football, basketball and turning back. For example, the lung capacity of middle and long distance runners and swimmers can reach more than 6000 ml.
Baidu encyclopedia-vital capacity