Lying Dumbbell External Shoulder Rotation
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The Lying Dumbbell External Shoulder Rotation is a strength exercise performed lying on your side with a light dumbbell in hand, elbow tucked at your side and bent at 90 degrees, rotating the forearm outward away from the body to target the rotator cuff. Its primary purpose is to strengthen and stabilize the shoulder joint, enhancing mobility and preventing injuries. It mainly works the infraspinatus and teres minor in the rear deltoids and rotator cuff, benefiting athletes, weightlifters, and anyone with shoulder instability or overhead sports demands.
How to Perform Lying Dumbbell External Shoulder Rotation
- 1Lie face-up on a flat bench with your knees bent and feet flat on the floor for stability.
- 2Hold a light dumbbell in one hand with your elbow bent at 90 degrees, tucked against your side, and forearm pointing straight up toward the ceiling (upper arm parallel to the floor).
- 3Place your opposite hand on your abs or hold the bench for support; keep your working elbow in contact with your side throughout.
- 4Inhale to prepare, then exhale as you rotate your forearm outward (away from your midline) until your knuckles face forward and forearm is roughly parallel to the floor.
- 5Inhale as you slowly rotate your forearm back to the starting position (knuckles facing up).
- 6Perform 10-15 reps per side, then switch arms.
- 7Key form tips: Keep your elbow pinned to your side—avoid letting it flare out. Use a light weight to prioritize control over load. Maintain a neutral wrist and avoid shrugging your shoulder. Common mistake: swinging the weight with momentum instead of isolating the rotator cuff.
