Impingement syndrome is a common overuse injury of the shoulder. There are several mechanisms that may lead to this condition including:

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Quizplus · Accepted Answer

Weakness and poor coordinated scapular stabilizers, including Serratus anterior, Rhomboids (major/minor) and Pectoralis minor, are factors that can lead to impingement syndrome of the shoulder. While swimming can contribute to overuse injuries, it is not directly related to the mechanism of impingement syndrome. The reduction in scapular retraction and downward rotation of the glenoid cavity during movements of the arm into elevation is a consequence of the weakened scapular stabilizers, rather than a cause of impingement syndrome. The supraspinatus muscle is involved in impingement syndrome, but is not considered a scapular stabilizer.

Impingement Syndrome Is a Common Overuse Injury of the Shoulder