Complex sentence: The final common factor is impingement syndrome, the most common non-sport related injury and which occurs when the tendons of the rotator cuff muscles become irritated and inflamed while passing through the subacromial space beneath the acromion.
Split into simpler sentences: The final common factor is impingement syndrome, the most common non-sport related rotator cuff injury. This occurs when the tendons of the rotator cuff muscles become irritated and inflamed while passing through the subacromial space beneath the acromion.