Breath-holding duration varies from person to person and there is no fixed value health value, the normal adult breath-holding time is 40-60 seconds. Breath holding time is related to lung capacity, chest expansion and respiratory muscle strength. Lung capacity is an important indicator of lung function, large lung capacity can hold their breath for more than 2 minutes, in chronic bronchitis, chronic obstructive pulmonary disease, pulmonary heart disease and other diseases patients, due to airway narrowing, airway resistance increases, lung function decreases, so the time to hold their breath is shortened. Exercise exercises lung function. Aerobic exercise can be chosen to increase the depth of breathing and the amplitude of respiratory muscles to promote the increase of lung capacity after alveolar expansion. If you often hold your breath for too short a time and have difficulty breathing, you should seek medical attention to find out the cause and treat according to the cause.