What you'll gain

• Isolates and builds the rear delts for balanced shoulder development.

• Removes lower-back strain through the chest-supported position.

• Improves posture by strengthening the upper-back muscles that pull shoulders open.

Step-by-Step Instructions

1. 1

   Set a bench to about a 45 degree incline and lie face-down on it with a dumbbell in each hand.

2. 2

   Let the arms hang straight toward the floor, palms facing each other, with a slight bend in the elbows.

3. 3

   Brace the core, plant the toes on the floor, and lock the slight elbow bend for the set.

4. 4

   Open the arms out to the sides in a wide arc, leading with the elbows toward the ceiling.

5. 5

   Squeeze the rear delts and the middle of the back together at the top of the lift, pausing briefly.

6. 6

   Lower the dumbbells under control over 2 to 3 seconds back to the hanging start position.

Common Mistakes

• Bending and straightening the elbows mid-rep, which sneaks the triceps and traps into the lift.

• Pulling the dumbbells back like a row, swapping rear-delt isolation for mid-back rowing work.

• Shrugging the shoulders up at the top, which trades rear-delt work for trap engagement.

• Loading too heavy, which forces swinging form and removes the strict isolation the bench enforces.

About This Exercise

The dumbbell laying reverse fly is a reverse fly performed lying chest-down on an inclined bench. That position takes the lower back fully out of the lift and forces the rear delts and mid-back to do all the work as the arms open out to the sides — making it one of the cleanest rear-delt isolations available. For app and content use, this is the rear-delt exercise to ship for users who get cranky lower backs from bent-over rear flies. It belongs in pull-day flows, posture-correction blocks, postural training for office-worker programs, and any hypertrophy track building a balanced shoulder. It's also a clean teaching piece because the bench enforces strict form automatically.

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