Slow and Accelerated Rehabilitation Protocols

Inclusion Criteria: * being in the age range of 18-65 years * being diagnosed with massive, irreparable rotator cuff tears based on magnetic resonance imaging and clinical continuity tests * symptoms are unresponsive to conservative care including steroid injections and physiotherapy for at least 6 months * having a good command of the Turkish language * scoring above 24 in the Mini Mental State Test * ≥80% compliance in completing the post-ARCR Phase 1 trainings * volunteering to participate in the study Exclusion Criteria: * diabetes mellitus * neurological problems * cervical disc herniation * visual, verbal, and/or cognitive defects (aphasia, unilateral neglect, etc.) * systemic inflammatory problems * hypermobility, trauma, and/or inflammation that could be a contraindication for mobilization * former shoulder fractures on the affected side * advanced glenohumeral arthritis (Hamada grade 3), * deltoid muscle dysfunction, * irreparable subscapularis tears, * active infection, * shoulder stiffness, * a history of previous shoulder surgery