Shoulder pain is a common musculoskeletal condition in the general population. In the United States, the annual prevalence of shoulder pain was approximately 9% in adults in the period of 2002-2009 and shoulder pain ranked fourth behind low back pain, knee pain, and neck pain as the most prevalent musculoskeletal condition in 2009 (National Center for Health Statistics, 2011). Shoulder pain is a major cause of disability worldwide (Vos et al., 2016). Furthermore, shoulder pain places a significant economic burden on the healthcare system and society. Employed persons with shoulder pain require a median of 23 days off work in the United States and an average of 39 days off work in Canada (Saskatchewan Workers' Compensation Board,