Dumbbell Seated Rear Delt Fly
A seated bent-over fly that trains the rear delts and upper-back detail — the fix for the most undertrained area in lifting.
How to do it
- Sit on the edge of a bench with a dumbbell in each hand and your feet shoulder-width apart.
- Lean forward at the hips until your chest approaches your thighs and your arms hang straight down.
- Keep a slight bend in your elbows and your palms facing each other, dumbbells under your shoulders.
- Raise both dumbbells out to the sides in a wide arc until your upper arms are parallel to the floor.
- Squeeze your shoulder blades together at the top and feel your rear delts working.
- Lower the dumbbells under control along the same arc and reset before the next rep.
Key technique cue
Chest toward the thighs, fixed elbow bend; sweep out in an arc, no swinging.
Common mistakes
- ✕ Using too much weight and swinging the torso, which turns the exercise into a row instead of a fly.
- ✕ Bending the elbows and pulling instead of holding a fixed angle and lifting with the rear delts.
- ✕ Shrugging at the top, which shifts the work onto the traps.
- ✕ Sitting upright instead of leaning forward, which lets gravity bypass the rear delts entirely.
Benefits
- ✓ Builds the rear delts for a full, 3D shoulder shape.
- ✓ Balances high pressing volume in any push-heavy program.
- ✓ Improves posture by strengthening the upper-back stabilizers.
Progression: from easier to harder
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Step 1 -
Step 2 You are here - Dumbbell Seated Rear Delt Fly
- Ring Reverse Fly
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Step 3
About the exercise
The Dumbbell Seated Rear Delt Fly trains one of the most neglected muscle groups in lifting — the back of the shoulders. Sitting on the edge of a bench and leaning forward isolates the rear delts by removing momentum and lower-back drive, leaving a clean fly movement that builds the rear-delt detail that balances out heavy pressing work. It is a must-have exercise in any posture-correction program and a staple accessory on shoulder or pull days. It is a small, repeatable lift that coaches prescribe to office workers and to lifters with overdeveloped front shoulders, and it pairs well with face pulls and band pull-aparts.
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