The purpose of this study is to examine the effectiveness of a strength training protocol on the uninjured upper extremity either alone or with the addition of blood flow restriction (BFR) training on subjects who have undergone shoulder arthroscopy.

The purpose of this study is to examine the effectiveness of a strength training protocol on the uninjured limb either alone or with the addition of blood flow restriction (BFR) training on the status of the injured limb post shoulder arthroscopy. Patients will be randomized into one of three standardized physical therapy (PT) groups after shoulder arthroscopy: Control group (CON), Strength Training on the uninvolved shoulder (STR), strength training with the BFR on the uninvolved shoulder (BFR). All three patient groups will follow a standardized PT rehab protocol that is usual standard of care on the involved shoulder. The STR and BFR group will follow a typical standard of care rehab protocol to the uninvolved side to investigate the potential effects of cross-education. Isometric strength will be assessed utilizing handheld dynamometry (HHD) at Kerlan-Jobe during their regularly scheduled pre-operative and follow-up visits. Patients age 18 and older undergoing shoulder arthroscopy for rotator cuff repair and/or biceps tenodesis. The study includes 3 visits which are standard of care pre-operative and post-operative visits. The duration of the study will be 14 weeks. 2 weeks to allow for a pre-op baseline strength assessment and 12 weeks post-op for the final assessment during the patients routine follow-up visit. Physical Therapy will be standardized for all three groups in terms of frequency and rehabilitation protocol. The only exercises that will be added will be to the intervention groups on the uninvolved side. Patients will present to physical therapy 2-3 times/week during the duration of the study regardless of their group allocation.

Inclusion Criteria:

• 18 years and older
• Diagnosed with rotator cuff injury
• Scheduled for rotator cuff surgery via shoulder arthroscopy

Exclusion Criteria:

• Less than 18 years old
• History of previous contra-lateral surgery or injury
• Previous ipsi-lateral upper extremity surgery
• History of shoulder osteoarthritis

Data will be available for 6 months after the study has been published.