Shoulder
Infraspinatus
Musculus infraspinatus
Rotator cuff muscle; the prime mover of external rotation.
- Function
- External rotation and stabilization of the shoulder.
- Origin
- Infraspinous fossa of the scapula.
- Insertion
- Greater tubercle of the humerus (tuberculum majus).
How this muscle is trained
Infraspinatus is worked as the primary target in 2 of the 5 exercises listed here, and as a supporting muscle in the rest. The equipment those exercises use: Cable Machine, Resistance Band, Pec Deck Machine, Dumbbell.