You can practice lung capacity by exercising and adjusting your breathing. Normally arms try to open to the sides for chest expansion exercise. It can also be done by running, hiking, diving, and swimming. By increasing the load on the body through activities, the depth of breathing will increase as well. Blowing up balloons and practicing blowing and popping can also practice lung capacity. Adjusting your daily breathing is also a good method, such as taking deep breaths, holding your breath for a long time and then exhaling slowly, which helps to exercise your respiratory muscles, thus increasing your lung capacity. It is important to note that although there are many methods, but no matter which method you choose, you have to insist on it for a long time to achieve the desired effect. It is recommended that people with lung disease under the guidance of a doctor.