Dumbbell External Rotation
Description
The dumbbell external rotation is a critical rotator cuff exercise that isolates the infraspinatus and teres minor — small muscles essential for shoulder health. You can perform it side-lying or standing with your elbow pinned to your side. It is one of the most important prehab exercises for shoulder injury prevention.
Muscle Group
Equipment Required
Dumbbell External Rotation Instructions
- Lie on your left side on a bench or the floor. Hold a light dumbbell in your right hand.
- Pin your right elbow against your right side. Bend your right elbow at 90 degrees so your forearm is parallel to the floor across your stomach.
- Keeping your elbow pinned to your side throughout, rotate your forearm up and back, lifting the dumbbell toward the ceiling.
- Continue until your forearm is roughly perpendicular to the floor (or as far as your mobility allows).
- Squeeze your rear shoulder briefly.
- Lower under control back to the start over two seconds.
- Complete reps on one side, then switch.
- Use very light weight (2 to 8 lbs typically). The rotator cuff is small.
Dumbbell External Rotation Form & Visual
Dumbbell External Rotation Benefits
- Isolates the external rotators of the rotator cuff
- Critical for shoulder injury prevention
- Improves shoulder stability
- Useful prehab and rehab exercise
- Easy to do at home
- Should be in every lifter’s warm-up routine
Dumbbell External Rotation Muscles Worked
- Infraspinatus
- Teres minor
- Posterior deltoid (slight)
Dumbbell External Rotation Variations & Alternatives
- Cable External Rotation
- Resistance Band External Rotation
- Standing Dumbbell External Rotation
- Internal Rotation (counter exercise)
- L-Sit External Rotation
