Shoulder Internal Rotation


Shoulder internal rotation (or medial rotation) is a rotary movement at the shoulder (glenohumeral) joint around the longitudinal axis of the humerus (upper arm bone) towards the centre of the body – turning the upper arm inwards – see Figures 1 and 2.

Shoulder Internal Rotation

Figure 1. Shoulder Internal Rotation.

Shoulder internal rotation with cable

Figure 2. Shoulder internal rotation with cable.

The key muscles involved in this movement are the sternal and clavicular heads of the pectoralis major, the latissimus dorsi, and the anterior deltoid.  The teres major and subscapularis also play a weak role, as does the supraspinatus when the shoulder is flexed.

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Golf Anatomy and Kinesiology, a collection of articles describing the roles of the muscles involved in the golf swing.

The Role of the Deltoids in the Golf Swing

The Role of the Latissimus Dorsi Muscle in the Golf Swing

The Role of the Pectoralis Major Muscle in the Golf Swing

Supraspinatus muscle

The Role of the Teres Major in the Golf Swing


Introduction to the Swing like a Champion System.

Overview of a Great Golf Swing which summarises the correct movements in a great golf swing.


» Golf swing instruction home page.

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