Rotator Cuff Tears (RCTs)

The goals of this observational study are (1) to determine the smallest worthwhile effect of rotator cuff repair surgery compared to exercise therapy in rotator cuff patients; (2) to determine the smallest worthwhile effect of supervised exercise therapy compared to unsupervised exercise therapy in rotator cuff patients. Another objective of the study is to identify the demographic and clinical factors affecting the smallest worthwhile effect. The main questions it aims to answer are: 1. What is the smallest worthwhile effect of rotator cuff repair surgery compared to exercise therapy? 2. What is the smallest worthwhile effect of supervised exercise therapy compared to unsupervised exercise therapy? 3. Do demographic and clinical factors influence the smallest worthwhile effect? Participants will be asked to provide demographic and clinical data and to answer questions on a survey.

The goal of this clinical trial is to learn whether platelet-rich plasma (PRP) injection, made from a participant's own blood, can help heal the tendon and improve shoulder symptoms in people with partial tears of the supraspinatus tendon. The main questions it aims to answer are: * Does PRP help the tendon heal? * Does PRP improve pain, shoulder movement, daily function, and shoulder magnetic resonance imaging (MRI) findings? Researchers will compare PRP plus standard of care (physical therapy) to standard of care alone to see if PRP leads to better healing and better clinical results. Researchers will also study if differences in specific biomolecules in PRP are associated with differences in treatment response. Participants will: * receive standard of care treatment, with or without PRP injection depending on the study group * have blood collected for PRP preparation * have their pain, shoulder movement, and shoulder function assessed * undergo shoulder MRI scans * be followed over time to measure healing and symptom improvement