Siva Jyothi, N., Senthil Selvam, P., Ahmedullah, M., Yatheendra, K.G., Subramanian, S.S. and Paul, J. 2022. Effectiveness of PNF stretch of pectoralis major muscle on pulmonary function in COPD patients. International journal of health sciences. 6, S1 (May 2022), 13332–13341. DOI:https://doi.org/10.53730/ijhs.v6nS1.8464.