There are about 16 million people in the United States alone who have chronic obstructive pulmonary disease (COPD). This condition is characterized by slow but persistent lung function decline that leads to breathlessness, chest pain, and fatigue. Several lifestyle changes can significantly reduce the rate at which COPD progresses including an improved exercise routine, a refined diet, inhaled medications, and most importantly, oxygen therapy. Every case of COPD is different, however, so patients should consult with their doctor to learn which lifestyle changes will benefit them.