Effects of Concentric and Eccentric Full Can Exercises on Shoulder Muscle Structure in Adults with Partial Rotator Cuff Tears

What this Trial Is About

Researchers are comparing the effects of two types of full can exercisesconcentric and eccentricon the supraspinatus muscle structure in people with partial rotator cuff tears. These tears commonly cause shoulder pain and limit movement. The study focuses on understanding how different muscle contractions during exercise influence muscle architecture and clinical outcomes, aiming to improve rehabilitation strategies for this condition. Participants are randomly assigned to either a concentric or eccentric full can exercise group. Both groups receive a standard physiotherapy program that includes therapeutic ultrasound, transcutaneous electrical nerve stimulation TENS, and shoulder rehabilitation exercises. The concentric group emphasizes the lifting phase of the exercise, while the eccentric group focuses on the lowering phase. These exercise sessions are conducted three times a week for six weeks, totaling 18 sessions. During the study, participants will be assessed at the start and end of the six-week intervention. Researchers will measure changes in the supraspinatus muscle pennation angle using ultrasound imaging as the primary outcome. Secondary measures include muscle fiber length, cross-sectional area, pain levels, shoulder range of motion, muscle strength, functional status, and fear of movement. The study uses blinded assessors and randomized group assignment to monitor safety and effectiveness over the treatment period.

Concentric vs Eccentric Full Can Exercise in Partial Rotator Cuff Tears