Ninety-one patients with proximal humerus fractures were randomized to receive continuous passive motion therapy (n=46) or standard rehabilitation (n=45). The primary outcome of interest was the range of motion (ROM), specifically forward flexion and abduction. Secondary outcomes included patient-reported outcomes such as the Constant Score, QuickDASH, Subjective Shoulder Value (SSV), and pain visual analog scale (VAS). Assessments occurred at 6 weeks, 3 months, and 12 months postoperatively. Overall, CPM therapy resulted in significantly better ROM for forward flexion and abduction at 6 weeks but showed no differences at 3 or 12 months. Secondary outcomes did not differ significantly between the groups at any time point. The findings suggest CPM facilitates early functional recovery but does not provide long-term benefits