Postoperative Shoulder Dysfunction

This prospective, randomized, assessor-blinded, parallel-group clinical trial evaluates the effectiveness of a home-based upper extremity-focused prehabilitation program in women undergoing breast cancer surgery. Participants will be randomized 1:1 to either prehabilitation or usual care. Primary outcomes include shoulder range of motion and upper extremity function (DASH score). Secondary outcomes include grip strength, pain, fatigue, disability, anxiety/depression, and lymphedema incidence up to 2 years postoperatively.