Objective: The objective of this study is to compare effect of balloon blowing exercise & incentive spirometer on Chest expansion, Improvement in lung volumes and capacities, Level of dyspnoea, and on Improvement in progression of walk in post-thoracotomy stable patients.

Study Design: Randomized Controlled Trial

Place and Duration of Study: Study was conducted in thoracic surgical ICU of Gulab Devi Hospital, Lahore for the period of 6 months from September 2018 - February 2019.

Patients and Methods: The sample size was calculated through Open Epi, and it was 48.  24 subjects were assigned to control group A and 24 to experimental group B through non-purposive random sampling technique. Data was collected at base line, 3^rd and 5^th day after exercise therapy on above stated outcome measures, by using Tape Measure, Digital Spirometer, RPE Scale and Pedometer respectively, from non-critical post-thoracotomy patients. Control Group-A performed routine respiratory physiotherapy + incentive spirometry and Experimental Group- B performed routine respiratory physiotherapy + balloon blowing exercise.

Results: BBE + routine respiratory physiotherapy was found equally effective on mentioned outcome measure as Incentive Spirometry + routine respiratory physiotherapy in stated patients.  (P >0.05)

Conclusion: Based upon statistical analysis, it can be concluded that incentive spirometer can be replaced with balloon-blowing exercise with conventional/routine respiratory physiotherapy in thoracotomy patients who have lung surgeries, to overcome post-op pulmonary complications or to achieve the same outcomes as that of incentive spirometer.

Keywords: BBE, Incentive Spirometer, Routine Respiratory Physiotherapy, Post-Thoracotomy Patients.