Shoulder internal rotation

  • Deltoid

    Deltoid Muscle

    The deltoid muscle is used in all side lifting movements and any movement of the humerus on the scapula. It is divided into three portions, anterior, middle and posterior, with the fibres having different roles due to their orientation.

  • Latissimus Dorsi

    Latissimus Dorsi muscle

    The Latissimus dorsi muscle is one of the largest in the body. It is a powerful extensor muscle of the arm and is used extensively in chinning and climbing. They are commonly known at the lats.

  • Pectoralis Major

    Pectoralis Major Muscle

    Pectoralis major is the largest and most superficial of the two chest muscles. Pec major and the anterior fibres of Deltoid work closely together. Pec-fly and push-up exercises work the Pectoralis major.

  • Teres Major

    Teres Major muscle

    Teres major is only functional when the Rhomboids fix the scapula. This muscle mainly helps Latissimus dorsi.

  • Subscapularis Muscle

    Subscapularis Muscle

    The subscapularis muscle is one of the four rotator cuff muscles. It is hidden behind the rip cage on the underside of the scapula or shoulder blade and is often injured by throwing sports.