Dumbbell Prone Rear Delt Swing exercise animation (Male)

Dumbbell Prone Rear Delt Swing

Target muscle
Deltoid Posterior
Synergist muscles
Trapezius Middle Fibers
Equipment
Dumbbell
Body part
Shoulders
Type
Strength

The dumbbell prone rear delt swing is a shoulder isolation exercise that targets the rear deltoids (posterior deltoid), with the middle trapezius assisting to retract the shoulder blades. Performed lying face-down on an incline bench, it isolates the back of the shoulders and helps balance pressing-heavy programs and improve posture.

How to do the Dumbbell Prone Rear Delt Swing

  1. 1Set an incline bench to roughly 30–45° and lie face-down (prone) on it, chest and stomach supported, with your head clear of the top edge.
  2. 2Hold a dumbbell in each hand with your arms hanging straight down toward the floor and your palms facing each other (neutral grip).
  3. 3Brace your core and set your shoulder blades, keeping a slight, soft bend in your elbows.
  4. 4Lead with your elbows and swing the dumbbells out and back in a wide arc until your upper arms reach about shoulder height, squeezing your shoulder blades together.
  5. 5Keep the movement controlled and avoid using momentum from your torso or legs to throw the weight up.
  6. 6Pause briefly at the top, feeling the contraction in the back of your shoulders.
  7. 7Lower the dumbbells under control back to the starting position, resisting the descent.
  8. 8Complete your reps, then set the dumbbells down safely.

Form tips

  • Keep a fixed, slight bend in your elbows throughout so the rear delts do the work rather than the arms turning it into a row.
  • Lead the movement with your elbows and pinkies, not your hands, to bias the posterior deltoid.
  • Use lighter dumbbells than you think — this is an isolation move where control and a clean squeeze beat heavy weight.
  • Keep your neck relaxed and your gaze down so you don't strain it craning forward.

Common mistakes

  • Using momentum to swing the weight up with your whole body, which shifts the load off the rear delts and reduces the training effect.
  • Lifting too heavy and bending the elbows into a row, which recruits the lats and biceps instead of isolating the rear delts.
  • Shrugging the shoulders up toward the ears, which over-involves the upper traps and takes tension off the target muscle.
  • Cutting the range short and not raising the upper arms to shoulder height, leaving the contraction incomplete.

Frequently asked questions

What muscles does the dumbbell prone rear delt swing work?

It primarily works the rear deltoids (posterior deltoid), with the middle fibers of the trapezius assisting to retract the shoulder blades.

What angle should the bench be?

An incline of about 30–45° works well. It supports your chest so you can isolate the rear delts without your lower back or momentum taking over.

How many sets and reps should I do?

Because the rear delts respond well to higher volume, aim for 3–4 sets of 12–20 reps with a weight you can control through a full range.

What's a good alternative to the prone rear delt swing?

The standard dumbbell rear delt fly or a reverse pec deck train the same muscle. The prone version simply removes momentum by supporting your torso on the bench.

Where should I feel this exercise?

You should feel it in the back of your shoulders and between your shoulder blades. If you feel it mainly in your lower back or biceps, lighten the load and lead with your elbows.

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