This document discusses two breathing exercises - pursed lip breathing and diaphragmatic breathing - that help improve oxygenation, ventilation, and relaxation for patients with shortness of breath, especially chronic pulmonary obstructive disorder. Pursed lip breathing involves breathing in through the nose and out slowly through pursed lips. Diaphragmatic breathing focuses on using the diaphragm muscle to breathe in by letting the abdomen rise and breathing out by tightening stomach muscles. Both exercises can help manage symptoms and promote relaxation.