This in vivo rat study (n=108) uses a validated supraspinatus tendon model to directly compare three injury conditions — extrinsic subacromial compression alone, treadmill overuse alone, and their combination — on the development of rotator cuff tendinosis, measuring histologic, geometric, and biomechanical outcomes at 4, 8, and 16 weeks.
When you see a patient with a hooked acromion or type III acromial architecture who does repetitive overhead work, recognize that neither factor alone may be sufficient to drive tendinosis — but together they create synergistic injury, supporting targeted counseling about activity modification in anatomically at-risk individuals even before symptoms fully develop.
This in vivo rat study (n=108) uses a validated supraspinatus tendon model to directly compare three injury conditions — extrinsic subacromial compression alone, treadmill overuse alone, and their combination — on the development of rotator cuff tendinosis, measuring histologic, geometric, and biomechanical outcomes at 4, 8, and 16 weeks.
When you see a patient with a hooked acromion or type III acromial architecture who does repetitive overhead work, recognize that neither factor alone may be sufficient to drive tendinosis — but together they create synergistic injury, supporting targeted counseling about activity modification in anatomically at-risk individuals even before symptoms fully develop.