A single arm design will be used to assess the feasibility and preliminary efficacy of a closed-chain rehabilitation protocol for patients with full thickness rotator cuff tears of the shoulder. Full thickness rotator cuff tears will be documented using MRI or ultrasound images. 30 participants will be recruited for this study. The rehabilitation protocol will include two stages: stage 1, physical therapy, and stage 2, gym program. Stage I will include a total number of session between 12 and 24. The number of session included in stage 2, will depend on the total number of session completed during stage 1. The total duration of both stages will 5 months.