The vital capacity of normal adults is 3500 ~ 4000ml for males and 2500 ~ 3000ml for females. The vital capacity of adults is greater than that of children and the elderly. There are individual differences in the size of vital capacity. For example, tall and heavy people have larger lung capacity. On the contrary, people who are short and light have smaller lung capacity.

In addition, the size of vital capacity is related to the strength of respiratory muscles and the scope of thoracic expansion. When it is relatively quiet, the breathing is shallow; During exercise, the depth and frequency of breathing increase sharply. At this time, it is necessary to strengthen the activity of respiratory muscles, increase the ability to expand the chest, and expand most alveoli. In this way, over time, the strength of respiratory muscles can be enhanced, the range of chest activities can be expanded, and the number of air-filled alveoli can be increased, so the vital capacity can also be increased.

Taking part in any physical activity can increase your vital capacity. However, due to the different characteristics of sports, the effects on various organs of the human body are also different: swimming, diving, long-distance running, martial arts, ball games and other sports. , it has obvious influence on the function of respiratory organs, while weightlifting and other sports have little influence on respiratory function, and the vital capacity is correspondingly small.

Besides exercise, abdominal breathing can also increase vital capacity and reduce lung pressure. For example, taking a deep breath while singing can increase lung capacity.

Playing musical instruments always requires a lot of breathing exercises, which can also increase lung capacity, such as playing flute and saxophone.