Dumbbell Upright External Rotation
Muscles
Target
Teres Minor
Synergists
Infraspinatus
Deltoid, Posterior
Stabilizers
Rhomboids
Wrist Extensors
Instructions
Preparation
Stand or sit with dumbbell positioned out to side of head; bent elbow, shoulder height with dumbbell above elbow.
Execution
Lower dumbbell forward by rotating shoulder. Return and repeat. Continue with opposite arm.
Comments
Throughout movement, keep bent elbow (approximately 90°) out to side, shoulder height.
Source: exrx.net