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The three shoulder muscles are of equal degree because the disparity in the size of any part of the shoulder is striking.
You may sometimes need to train the posterior and lateral shoulder muscles more than the anterior shoulder muscles which you train indirectly during an exercise?
The glenohumeral joint: It is the overlap of the upper arm in the shoulder ball
The myoclavicular joint: It is the junction of the collarbone and the shoulder blade
The shoulder also contains a large number of muscles that form its external shape and help it move in a wide range in addition to protecting the basic shoulder joints.
The largest muscle of the shoulder is the triangular deltoid. This large muscle covers the shoulder joints, forming its round shape, and it consists of three main muscles:
Anterior shoulder muscles
The lateral shoulder muscles
Posterior shoulder muscles