This is a prospective longitudinal observational cohort study of patients with shoulder disorders undergoing a standardized rehabilitation program supported by the REHABI digital automated model in a private physiotherapy clinic. The study aims to describe clinical outcomes in routine practice and to optimize a 24-test functional assessment battery based on deficit prevalence, magnitude, and responsiveness.

This is a prospective longitudinal observational cohort study of 129 adult patients (≥18 and ≤71 years) with acute non-traumatic shoulder pain and/or dysfunction treated in a private sports physiotherapy clinic in Pamplona, Spain. All patients undergo a standardized rehabilitation program supported by the REHABI automated digital model, which links quantified deficits obtained from a 24-test functional assessment battery to specific exercise prescriptions and progression rules. The study aims to describe clinical outcomes in routine practice (global clinical deficit score, shoulder pain intensity, number of treatment sessions, and days to discharge) and to optimize the initial 24-test battery based on deficit prevalence, magnitude, and responsiveness to change between baseline and discharge.

The main objectives are: (1) to evaluate the clinical effectiveness and feasibility of the REHABI model in routine clinical practice; and (2) to reduce the initial 24-test assessment battery to a smaller core set of tests using mixed criteria based on prevalence, magnitude of deficit, and responsiveness to change.

Inclusion Criteria:

• 18-71 years of age, acute non-traumatic shoulder pain/dysfunction, and access to a smartphone to view the exercises.

Exclusion Criteria:

• Acute fractures or dislocations, arthritis/arthrosis, osteosarcoma, osteomyelitis, and recent shoulder surgeries.

Adult patients with musculoskeletal shoulder pain treated in a private sports physiotherapy clinic in Pamplona, Spain, who are referred or self-referred for conservative management, consecutively enrolled in the REHABI digital rehabilitation program, and who have access to and basic skills to use a smartphone.

At present, there is no plan to share individual participant data (IPD). This is a single-center study with a relatively small sample and detailed clinical assessments, which may increase the risk of re-identification, and the original informed consent did not explicitly cover broad IPD sharing. De-identified summary results will be available in the published manuscript, and additional aggregated information may be considered upon reasonable request.