1 / 5Drink enough water to stay well hydrated, it is equally important for the lungs as it is for the rest of the body.2 / 5Pollution also negatively affects lung capacity. To avoid pollution, you should wear a mask while leaving the house.3 / 5Being overweight also reduces lung capacity because abdominal obesity does not allow the lungs to function properly.4 / 5The first and foremost thing to maintain lung capacity is to quit smoking. Also, avoid other tobacco products. 5 / 5Eating right, exercising well, and avoiding any kind of toxic substances is the key to having healthy lung capacity. Strengthen the resistance of respiratory muscles and lungs by consuming the right amount of protein and antioxidants.