Lung volume is the maximum ventilation of a breath, in a certain sense can reflect the potential capacity of respiratory function, mainly including tidal volume, make-up inhalation volume, make-up exhalation volume three parts. Adult men’s lung capacity is about 3500mL, women’s is about 2500mL. lung capacity and the body’s muscle type, personal physical quality, cardiopulmonary function and age have a lot to do with the general strong people’s lung capacity is the largest, young and old people is relatively small, the better the health of the larger the lung capacity. If there is lung tissue damage, such as tuberculosis, pulmonary fibrosis, pulmonary atelectasis, pneumonia, lobectomy, etc., can make the lung capacity decrease. Daily exercise can be maintained to increase lung capacity and improve physical fitness, such as running, swimming and push-ups.