Forceful bending of arms may tear your labrum cartilage and the tendons. This injury is called SLAP (superior labrum anterior to posterior) Lesion and cause severe pain if not treated immediately. O'Brien's test is utilized to check for a slap lesion.
Anterior graphic of the shoulder. The tendon of the subscapularis muscle attaches both to the lesser tubercle aswell as to the greater tubercle giving support to the long head of the biceps in the bicipital groove. Dislocation of the long head of the bice