Chronic Obstructive Pulmonary Disorder manifested as breathlessness, respiratory difficulties and persistent cough is one of the biggest causes of mortality around the world. 2.1% of Pakistani population has COPD. Proprioceptive neuromuscular facilitation is used as management technique in which muscle stretching promotes chest wall mobility and restores regular breathing rhythm. In previous studies, PNF technique combined with aerobic exercises has been utilized to improve Pulmonary functions in COPD patients. But the sample size of these studies was small and participants were ventilated patients, hence not targeting the diaphragm. Our study shall evaluate the impact of PNF technique combined with aerobic training on the Pulmonary function of COPD patients in the clinical setting.