Dumbbell Shoulder Internal Rotation at 90 Abduction

Description

How to do Dumbbell Shoulder Internal Rotation at 90 Abduction

1. 01
   Setup

   Lie on your side with the target arm's elbow bent 90 degrees and abducted 90 degrees from your torso, resting your upper arm on the ground or a small towel.

2. 02
   Setup

   Hold a light dumbbell with an overhand grip, with your forearm perpendicular to the floor. Support your head with your free hand or a pillow to maintain a neutral spine.

3. 03

   Slowly lower the dumbbell towards the ground by internally rotating your shoulder, keeping your elbow stationary and only allowing your forearm to move.

4. 04

   Once your forearm is parallel to the floor or slightly below, pause briefly, then slowly rotate your arm back up to the starting position, controlling the movement.

5. 05

   Exhale as you internally rotate the shoulder (lower the dumbbell) and inhale as you return to the starting position.

Tips

• Maintain a very light weight to prioritize rotator cuff engagement and avoid compensating with larger muscle groups.
• Keep the movement slow and controlled throughout the entire range of motion, focusing on the internal rotation of the humerus within the shoulder joint.
• Ensure your elbow remains perfectly still, acting as a pivot point; avoid letting it lift off the ground or move forward/backward.

Common mistakes

• Using excessive weight causes the elbow to lift or the torso to twist; fix this by selecting a much lighter dumbbell that allows strict isolation of the shoulder rotation.
• Rushing the movement leads to momentum taking over; instead, perform each repetition with deliberate control, especially during the eccentric (lowering) phase.