ORIGIN

Posterior aspect of the inferior angle of the scapula

 

INSERTION

Medial lip of the intertubercular sulcus of the humerus

 

ACTION

Internal rotation (medial rotation) of the humerus

 

INNERVATION

Lower subscapular nerve (C5,6)

 

PRIMARY JOINT

Glenohumeral joint

 

KEY STRENGTH TRAINING EXERCISES

Barbell cuban press

Standing dumbbell external shoulder rotation

 

NEW STRENGTH TRAINING EXERCISES

Standing cable external shoulder rotation

Side lying windmill

Scapular wall slide

 

COMMON INJURIES

Strain/stiffness

Tear