Dumbbell Rotation Reverse Fly exercise animation (Male)

Dumbbell Rotation Reverse Fly

Target muscle
Deltoid Posterior
Synergist muscles
Deltoid Anterior, Deltoid Lateral, Infraspinatus, Teres Minor, Trapezius Lower Fibers, Trapezius Middle Fibers
Equipment
Dumbbell
Body part
Shoulders
Type
Strength

The dumbbell rotation reverse fly is a bent-over shoulder exercise that targets the rear deltoids, with help from the lateral and front delts, the rotator-cuff muscles (infraspinatus and teres minor), and the mid and lower trapezius. Adding an external rotation of the arms as you raise the dumbbells deepens the squeeze on the rear shoulders and upper back, making it a strong choice for balancing pressing work and improving posture.

How to do the Dumbbell Rotation Reverse Fly

  1. 1Hold a dumbbell in each hand and hinge forward at the hips until your torso is roughly parallel to the floor, keeping a soft bend in your knees and a flat back.
  2. 2Let the dumbbells hang straight down beneath your shoulders with your palms facing each other and a slight bend in your elbows.
  3. 3Brace your core and pull your shoulder blades slightly toward each other to set your starting position.
  4. 4Raise the dumbbells out to your sides in a wide arc, leading with your elbows until your arms reach shoulder height.
  5. 5As you lift, rotate your wrists and arms outward (external rotation) so your thumbs turn up and back, squeezing your rear delts at the top.
  6. 6Pause briefly at the top, feeling the contraction across the backs of your shoulders and upper back.
  7. 7Lower the dumbbells under control, reversing the rotation back to a neutral, palms-facing grip as your arms return beneath you.
  8. 8Complete your reps, then stand up by hinging back through your hips and set the dumbbells down.

Form tips

  • Keep the bend in your elbows fixed throughout the movement so the rear delts do the work instead of your arms pressing the weight up.
  • Lead the lift with your elbows, not your hands, to keep tension on the rear shoulders rather than the traps.
  • Use a lighter weight than you would for a lateral raise — the rotation and rear-delt focus reward control over load.
  • Keep your neck long and your gaze down and slightly forward to maintain a flat, neutral spine.
  • Move slowly through the external rotation at the top to maximize the squeeze on the rear delts and rotator cuff.

Common mistakes

  • Using momentum to swing the dumbbells up, which shifts work away from the rear delts and risks straining your lower back.
  • Rounding your back during the hinge, which puts the spine under unsafe load when bent over.
  • Shrugging the shoulders up toward the ears, which lets the upper traps take over instead of the rear delts.
  • Going too heavy so the elbows bend and the movement turns into a row, losing the targeted rear-shoulder isolation.
  • Rushing or skipping the external rotation, which removes the extra rear-delt and rotator-cuff stimulus that defines this variation.

Frequently asked questions

What muscles does the dumbbell rotation reverse fly work?

It primarily targets the rear deltoids, with the lateral and front delts, the infraspinatus and teres minor of the rotator cuff, and the middle and lower trapezius assisting. The added rotation increases the demand on the rear shoulders and cuff.

Where should I feel this exercise?

You should feel it across the backs of your shoulders and between your shoulder blades. If you mostly feel it in your upper traps, lower the weight and lead with your elbows instead of shrugging.

How is this different from a regular dumbbell reverse fly?

A standard reverse fly keeps a fixed grip throughout. This version adds an external rotation of the arms as you raise the dumbbells, turning the thumbs up and back, which increases the squeeze on the rear delts and engages the rotator cuff more.

How many sets and reps should I do?

Because this is an isolation move that rewards control, 3–4 sets of 12–15 reps with a lighter weight works well. Focus on a full, deliberate squeeze rather than heavy load.

Is the dumbbell rotation reverse fly good for beginners?

Yes. It is beginner-friendly when you keep the weight light and the back flat. It helps build rear-shoulder strength and posture, balancing out the chest and front-delt work from pressing exercises.

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