The purpose of this prospective, randomized, parallel-group, single-center, controlled non-inferiority clinical trial is to determine whether a telerehabilitation program is non-inferior to a conventional rehabilitation program in patients with subacromial pain. Subacromial pain is a prevalent musculoskeletal condition, and while therapeutic exercise is the cornerstone of conservative management, adherence to home programs is often low. Conversely, conventional in-person physical therapy presents logistical and economic barriers for patients. This study aims to evaluate if a well-designed telerehabilitation program, utilizing information and communication technologies for remote monitoring, can provide an effective, accessible, and non-inferior alternative to conventional care. The primary outcome measured will be the change in shoulder function utilizing the QuickDASH questionnaire at 12 weeks. Secondary outcomes will assess pain intensity (VAS), range of motion (ROM), treatment adherence, and long-term functional outcomes.

Chronic subacromial pain represents a significant public health challenge and the most common musculoskeletal disorder after back and neck pain. Its etiology is multifactorial, causing substantial functional limitations, work disability, and a decrease in quality of life. The management of subacromial pain is primarily conducted through conservative interventions, with therapeutic exercise constituting the cornerstone of treatment to reduce joint pain, optimize shoulder function, and improve muscle strength.

Despite its efficacy, adherence to home exercise programs is often low due to a lack of supervision and motivation, which compromises long-term outcomes. While supervised, conventional in-person physical therapy improves adherence and functional outcomes, it presents significant logistical and economic barriers, such as travel costs, distance, and difficulty accommodating appointments within work schedules. This creates a gap in care, preventing many patients from receiving the necessary amount of therapy for optimal recovery.

Telerehabilitation, a remote healthcare delivery modality utilizing information and communication technologies, emerges as a promising solution to mitigate these barriers. Assisted digital therapy programs can be utilized to maximize treatment intensity, provide real-time biofeedback, and allow physical therapists to progressively adjust exercise complexity under remote guidance. This approach can potentially improve treatment adherence and reduce indirect costs for patients by eliminating travel needs and decreasing time off work.

Although current evidence provides compelling data regarding the efficacy of telerehabilitation, establishing its superiority over static home exercise programs, there is a lack of standardized protocols. Furthermore, a clear consensus has not been established regarding its non-inferiority to the conventional in-person model within a standard, non-pandemic clinical setting.

To address this gap, this study proposes a prospective, randomized, parallel-group, single-center, controlled non-inferiority clinical trial. The primary objective is to compare the change in shoulder function, as measured by the QuickDASH, at the end of a 12-week program between a telerehabilitation group and a conventional rehabilitation group. Secondary objectives include comparing changes in pain intensity (VAS) and range of motion (flexion, abduction, and external rotation), as well as evaluating treatment adherence, patient satisfaction, and long-term functional outcomes at 6 months. Answering this question will lay the groundwork for establishing a standardized, evidence-based telerehabilitation protocol as a highly accessible and sustainable care modality for patients with subacromial pain.

Inclusion Criteria:

• Men and women aged 18 years or older.
• Diagnosis of Subacromial Impingement Syndrome (SIS) based on clinical criteria (pain with overhead activities, painful arc, positive Neer, Hawkins, or Jobe test). Radiological confirmation (ultrasound and/or magnetic resonance imaging) is accepted.
• Access to the internet and a device (smartphone, tablet, or computer) capable of running the telerehabilitation platform.
• Willingness and ability to provide written informed consent.

Exclusion Criteria:

• Shoulder pain caused by fractures, tumors, infections, or severe systemic pathologies.
• Previous surgery on the affected shoulder within the last 3 months.
• Prior joint injection (corticosteroid infiltration) in the affected shoulder within the last 3 months.
• Subjects with partial or full-thickness rotator cuff tears.
• Patients currently receiving concurrent physical therapy (PT) or any other external interventions for the shoulder condition.
• Current participation in another rehabilitation or exercise program.
• Pregnancy.
• Cognitive impairment, communication barriers, or any condition that prevents the patient from following the remote instructions.