As we continue to grow older, our body’s functions will gradually decline, so we need to do some tests to check the state of our body. Lungs – is an important organ to maintain the body’s respiration, to prove that the lungs are good or bad, generally is to check a person’s lung volume, the size of lung volume mainly depends on the expansion and contraction state of the chest cavity wall, and each person’s lung volume is different. The size of lung capacity and human breathing is closely linked, this is because the human body’s various organs in the operation of the consumption of oxygen, and oxygen can only be obtained through the lungs to breathe, the normal adult lung capacity of about 3500 to 4000 ml, and if the lung capacity test appears lower value, it means that the body’s organs may have some problems, the lack of oxygen supply will lead to some organs can not Normal operation, so the value of lung capacity is a major test of human health. Ways to improve lung capacity 1, to improve their lung capacity, first of all, you need to start with breathing, you can adjust their breathing habits, slow, long inhalation, so that the lungs are full of air, which will make the abdomen bulge, the chest cavity expand, adhere to a period of time, the next inhalation time will grow. 2, secondly, you can also do chest expansion exercises every day to increase lung capacity, chest expansion exercises can improve the muscle strength of the chest, expand the chest cavity, so persist in this will also make lung capacity growth, but also after inhalation, when the lungs are full of air, hold your breath for a while, and then in the exhale, which will also increase lung capacity. 3, you can try to swim, practice diving and swimming, in the water we can see the size of lung capacity, lung capacity of the longer people adhere to, more diving, persistently will also improve lung capacity. 4, finally, you can also adhere to the running and do some exercise, when running, with the exhalation of inhalation, will also slowly expand the chest cavity, daily exercise will also increase lung capacity.