Shoulder
Posterior Deltoid
Deltoideus pars spinalis
The rear head of the deltoid; dominant in pulling and reverse-fly movements.
- Function
- Shoulder extension, external rotation and horizontal abduction.
- Origin
- Spine of the scapula.
- Insertion
- Deltoid tuberosity of the humerus.
Synergists / Antagonists
Exercises that train this muscle
- Reverse Pec DeckMachine · BeginnerPrimary
- Bent-Over Reverse FlyFree weight · IntermediatePrimary
- Face PullCable · BeginnerPrimary
- Cable External RotationCable · BeginnerSecondary
- Prone Y-RaiseFree weight · BeginnerSecondary
- Pull-upBodyweight · AdvancedSecondary
- Lat PulldownMachine · BeginnerSecondary
- Seated Cable RowCable · BeginnerSecondary
- Bent-Over Barbell RowFree weight · IntermediateSecondary