Shoulders · Dumbbell
Dumbbell Seated External Rotation
How to do the dumbbell seated external rotation, the muscles it works, and the mistakes to avoid. Pulled straight from the Kovo app's exercise library.
- Equipment
- Dumbbell
- Difficulty
- Beginner
- Logged as
- Weighted reps
- Movement
- Rotation
- Mechanic
- Isolation
How to do it
Sit on a bench holding a light dumbbell, elbow bent 90 degrees and pinned against your side with your forearm across your stomach. Keeping the elbow glued to your waist, rotate your forearm outward away from your body until you feel a squeeze in the back of your shoulder, then return under control. Switch arms after your set.
- 1The small muscles of your rotator cuff working to rotate the forearm out
- 2Your elbow staying pinned tight against your side throughout
- 3A controlled, pain-free arc out and back
Common mistakes
- Letting your elbow drift away from your side
- Using a weight so heavy you twist your torso to move it
- Rushing the reps instead of rotating slowly
Muscles worked
The dumbbell seated external rotation mainly works the external rotators, with the rear delts assisting.
- External RotatorsPrimary
- Rear DeltsSupport
- ForearmsMinor
Kovo programs the dumbbell seated external rotation for you and tracks it every session.
We build your whole program, drop the right lifts into each workout, and adjust your weights as you get stronger. Free on iOS and Android.
More hips & adductors exercises
- How to do the butterfly stretch
- How to do the external rotation
- How to do the cable hip adduction
- How to do the internal rotation
- How to do the cobra pose
- How to do the core scrunch
Last reviewed June 2026.