This prospective longitudinal observational cohort study compared feasibility-allocated hybrid and in-clinic rehabilitation for adults with non-traumatic shoulder pain or dysfunction managed within the same standardized web- and mobile-supported semi-automated shoulder rehabilitation system (WMSSR). The primary outcome was observed time from baseline to documented clinical discharge among completed rehabilitation episodes. Secondary outcomes included total clinical deficit score, maximum pain per visit, number of painful tests per visit, Constant-Murley score at discharge, and adherence to prescribed rehabilitation sessions.