Press release: 11 July, 2021: It can be difficult to maintain a sufficient supply of oxygenated blood if you have chronic conditions such as pulmonary fibrosis (COPD) or chronic lung disease that is obstructive (pulmonary fibrosis). For people suffering from lung diseases their lung function and capacity may decrease as time passes. Lung function is the measure of the quantity of air in your lungs, the speed you breathe out and in, and how efficiently your lungs can remove carbon dioxide from your blood. Since lung capacity is the maximum oxygen your body can take in, lung function differs from lung capacity. In simple terms lung function refers to how your body makes use of air while lung capacity is the quantity of air that the body uses. While lung function can't be improved, lung capacity may be managed and increased. So, here are some ideas on how to increase lung capacity.