Your ability to raise your arm above your head is dependent upon the healthy function of a major joint in your shoulder region - the glenohumeral joint. This is what most of us know as the “ball and socket joint” of the shoulder. It allows you to move your scapula in pretty much every direction.
The rotator cuff muscles are what support the glenohumeral joint. A lot of people think there’s just one rotator cuff, but guess what? You’ve actually got four of them.
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