Spirometry is a common indicator of lung function and is related to a variety of factors, usually measured using a spirometer.
Spirometry is the sum of tidal volume, compensatory inspiratory volume and compensatory expiratory volume, which is susceptible to individual influences and is related to a person’s age, gender, stature, body position and other factors, and can be used to reflect the lung’s one-time maximum ventilation capacity. The average lung capacity of a normal adult male is about 3500 ml and that of a female is about 2500 ml.
Lung capacity is usually tested using a spirometer, usually in a state of calm breathing, inhaling as deeply as possible, blowing the mouthpiece over the mouth, and then slowly exhaling as much as possible.
Under normal physiological conditions, a decrease in lung capacity can be seen at the end of strenuous exercise and other activities; under pathological conditions, it can be seen in asthma, tuberculosis, pulmonary fibrosis, pulmonary atelectasis and other diseases that limit lung ventilation.
Improvement of lung capacity is conducive to the promotion of physical health, should be more strengthened exercise.