
Let’s speak about probably the most ignored, underrated, and criminally uncared for muscle group in health: your rear delts. You understand, these little muscle tissues on the again of your shoulders that appear to be angel wings once they’re toned—and like deflated balloons once they’re not. In case your shoulder routine is all entrance raises and lateral raises, you’re constructing a McMansion with no yard. Enter the rear delt fly, the final word train for balancing your shoulders, fixing your posture, and at last filling out these tank tops.
As a coach who’s rehabbed extra rounded shoulders than I can depend (thanks, desk jobs!), I’m breaking down precisely the best way to grasp this transfer. Spoiler: If you happen to’re doing it flawed, you’re simply waving your arms round. Let’s repair that.
What Is a Rear Delt Fly?
The rear delt fly is a shoulder train that primarily targets the posterior deltoids, that are the muscle tissues on the again of your shoulders. It is a easy but efficient motion, and when completed appropriately, it would remodel your shoulder energy, posture, and even scale back the danger of harm.
Why Your Rear Delts Deserve Consideration (And Why You’re In all probability Ignoring Them)
Your rear delts aren’t only for wanting good shirtless. They’re the glue that holds your shoulder well being collectively. Weak rear delts result in:
- Hunched posture (aka” Workplace Employee Syndrome”)
- Shoulder impingement (ache when reaching overhead)
- Imbalanced aesthetics (large entrance delts + unhappy rear delts = rooster wing vibes)
The rear delt fly targets these muscle tissues like a laser, pulling your shoulders again and down. Consider it as a posture corrector you are able to do in your front room.
Rear Delt Fly Muscle Labored
🎯 Major Muscle Labored
🔄 Secondary Muscle mass Concerned
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Rhomboids (main and minor) – Assist retract the scapula (pull your shoulder blades collectively).
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Trapezius (center and decrease fibers) – Help in stabilizing and shifting the shoulder blades.
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Infraspinatus & Teres Minor (Rotator cuff muscle tissues) – Assist with exterior rotation and shoulder stability.
Methods to Do the Rear Delt Fly Correctly
Kind is every part with regards to the rear delt fly. With out correct type, you received’t be focusing on the right muscle tissues, and also you may even danger harm. Right here’s the best way to do it proper:
1. Seated Rear Delt Fly (Utilizing Dumbbells or Machine)

Step 1: Sit on a bench or machine along with your ft flat on the bottom. Lean barely ahead out of your hips to maintain your again straight and abs engaged.
Step 2: Maintain a dumbbell in every hand along with your palms dealing with one another. Your elbows ought to be barely bent to keep up pressure all through the motion.
Step 3: Increase the dumbbells out to the facet, preserving your arms at about shoulder top. Concentrate on squeezing your shoulder blades collectively on the prime of the motion.
Step 4: Slowly decrease the weights again down, controlling the movement to keep away from utilizing momentum.
Tip: Hold your neck relaxed and keep away from shrugging your shoulders up in the course of the motion.
2. Bent-Over Rear Delt Fly (Dumbbells)

Step 1: Stand along with your ft shoulder-width aside, holding a dumbbell in every hand.
Step 2: Hinge at your hips, preserving a slight bend in your knees and your again flat. Let the dumbbells hold down in entrance of you with a impartial grip (palms dealing with one another).
Step 3: Whereas preserving a mushy bend in your elbows, increase each dumbbells out to the perimeters, specializing in pulling your elbows again somewhat than simply your palms. Take into consideration attempting to “pinch” your shoulder blades collectively.
Step 4: Slowly decrease the dumbbells again to the beginning place.
Step 5: Repeat on your desired reps.
Tip: Preserve a robust core all through to guard your decrease again and keep away from arching.
3. Reverse Pec Deck Machine

Step 1: Alter the machine’s seat in order that your arms are aligned along with your shoulders when sitting down.
Step 2: Maintain the handles along with your arms prolonged in entrance of you, palms dealing with down.
Step 3: Retaining your chest firmly pressed towards the pad, pull the handles again and out to the perimeters, specializing in squeezing your shoulder blades collectively.
Step 4: Management the weights as you slowly deliver the handles again to the beginning place.
Step 5: Repeat for the specified reps.
Tip: Hold a managed tempo to maximise pressure on the muscle tissues.
Rear Delt Fly Variations to Spice Up Your Exercise
If you happen to’re feeling like your rear delt fly routine is getting stale, attempt switching issues up with these variations:
1. Single-Arm Rear Delt Fly

Carry out the rear delt fly one arm at a time, which lets you deal with both sides individually. This can be a nice possibility if you happen to’re coping with any imbalances between your left and proper shoulders.
2. Banded Rear Delt Fly

Connect a resistance band to a sturdy object and carry out the rear delt fly, mimicking the motion you’d do with dumbbells. The band will present fixed pressure and activate the muscle tissues otherwise than dumbbells or cables.
3. Cable Rear Delt Fly

Set the cable machine to a low setting and use the ropes or handles to tug outward in the identical movement as a dumbbell rear delt fly. Cables present fixed resistance and supply a distinct really feel in comparison with free weights.
4. Rear Delt Fly with Reverse Grip

Holding the dumbbells with an underhand (supinated) grip throughout your rear delt fly can goal the higher again and posterior delts in a barely totally different approach.
The three Lethal Sins of Rear Delt Flies (And Methods to Repair Them)
Sin: Utilizing momentum such as you’re auditioning for Riverdance.
Repair: Lighten the burden. If you happen to can’t pause on the prime, it’s too heavy.
Sin: Letting your elbows flare out.
Repair: Hold elbows barely bent and pointed backward, not sideways.
Sin: Rounding your higher again like a scared cat.
Repair: Chest up, core braced, backbone impartial.
“However I Don’t Really feel It in My Rear Delts!”
Frequent complaints (and options):
“I really feel it in my traps/higher again.”
→ Decrease the burden. Concentrate on squeezing ONLY the rear delts.
“My decrease again hurts.”
→ Scale back the hinge angle. Sit on a bench and lean ahead as a substitute.
“It’s too straightforward.”
→ Add a 2-second pause on the prime. Or attempt drop units.
Methods to Program Rear Delt Flys Into Your Routine
For Hypertrophy (Development):
- 3-4 units of 12-15 reps
- Relaxation 60 seconds between units
- Pair with face pulls or rows
For Power/Endurance:
- 4-5 units of 8-10 reps (heavier weight)
- Relaxation 90 seconds
- Pair with pull-ups or deadlifts
For Posture Correction:
- 2-3 units of 15-20 reps (mild weight)
- Do day by day as a warm-up or finisher
FAQs
Is the rear delt fly for shoulders or again?
Primarily for the rear (posterior) delts, but it surely additionally prompts the higher traps, rhomboids, and rotator cuff muscle tissues within the higher again.
Ought to I take advantage of dumbbells or a machine?
Each work:
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Dumbbells: Extra freedom of motion and engages stabilizers.
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Machine (reverse pec deck): Offers higher isolation and is simpler to regulate, particularly for novices.
How usually ought to I prepare rear delts?
Prepare them 1–3 instances per week, relying in your routine. They’re usually undertrained, so together with them often may help forestall shoulder imbalances.
Can I do rear delt flys at dwelling?
Rear delt fly vs. reverse fly – identical factor?
Sure, they’re usually used interchangeably. Each goal the identical muscle group, though “reverse fly” could refer extra broadly to machine or cable variations.
The Backside Line
Rear delt flies aren’t glamorous, however neither is hunching like Quasimodo. Whether or not you’re lifting 5 lbs or 50, nailing this transfer will remodel your shoulders from “meh” to “rattling.”
Your mission: Add rear delt flys to your subsequent exercise. No excuses.
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