- Lie on side with legs separated for support. Grasp dumbbell
and position elbow against side and forearm across belly.
- Lift dumbbell by rotating shoulder. Return and repeat. Flip
over and continue with opposite arm.
- Maintain elbow against side and fixed elbow position (90°
angle) throughout exercise. Placing towel roll under arm increase
infraspinatus and teres minor EMG signal 20% to 25% compared
to no towel roll (Reinold MM, et
al. 2004). Also see Dumbbell
Shoulder External Rotation Errors.