The shoulder complex is an intricate kinetic mechanism comprising bone, joint, and soft tissue structures. This allows the upper limb (arm) to position itself inside almost the entire range of a sphere. The shoulder joint by itself is known as the glenohumeral joint – a ball and socket joint between the scapula and the humerus. This is the most mobile joint in the human body. The large range of motion is a result of our upright posture and is necessary for performing any kind of manual labor. This high mobility comes at a cost however – susceptibility to trauma. As with any joint, this one also has passive and active stabilizers. Yet they prove ineffective in the face of medium- and high-energy trauma, as well as repetitive microtrauma, i.e. repetitive strain injuries.