Low lung capacity is generally associated with long periods of inactivity, low physical fitness and other factors. To improve lung capacity, the first thing to do is to improve physical fitness and improve the mobility of the respiratory muscles, so that you can gradually improve lung capacity. You can choose the following types of exercise to increase lung capacity: first, to do more deep breathing training, adhere to do deep breathing 100-200 times a day. Usually you also need to pay attention to keep the indoor air clean and hygienic, avoid the smell of frying fumes, avoid second-hand smoke, indoor windows should be diligently opened and ventilated. Second, you can regularly do some chest expansion, arm vibration and other exercises, at least 100 times a day to do chest expansion exercises. Third, you can also do some more endurance training, such as playing basketball, folding and running. Fourth, you can also practice some diving, swimming, help exercise lung capacity.