New answers tagged pull-ups
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The shoulder is deemed to be a joint of the ball and socket type, as is the hip. The major difference is that in the hip, there is actually a bony socket on the pelvis (Called the acetabulum) that the head of the femur fits into. There really is no such structure in the shoulder, the "socket" in the shoulder is made up of tendon and cartilage structures.
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The shoulder joint is designed for flexibility and motion rather than for stability. Its stability comes largely from coordinated muscle control rather than its bony structure.
The shoulder blade or scapula is a foundation of the shoulder complex. When the scapulae are well stabilized against the chest wall, the rotator cuff and other shoulder muscles ...
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