Rear Delt Fly is best learned as a controlled sequence, not a race from the first position to the last. The exercise mainly trains rear delts, while rhomboids, middle traps, and rotator cuff help support and control the movement. You will use a pair of dumbbells while working from standing in a stable stance.
What makes a good Rear Delt Fly repetition?
Keep the ribs quiet and move the arms without turning the rep into a shrug or back bend. The movement has a clear, scalable pattern. Start light, learn the positions in order, and progress only while every repetition remains controlled.
Muscles worked
Primary
Rear delts
These muscles should carry most of the intended work when the setup and movement path stay consistent.
Supporting
Rhomboids, Middle traps, and Rotator cuff
These muscles assist the movement or help keep the rest of your position steady.
Set up before you move
Start from standing in a stable stance. Set your hands and feet so the position feels balanced before the first repetition. Check that a pair of dumbbells is secure and adjusted before you begin.
Step-by-step tutorial
How to do Rear Delt Fly
- 1
Hinge with weights hanging
Hold two dumbbells, hinge forward with a neutral spine, and let the arms hang below the shoulders.
Breathing: Breathe steadily; do not hold your breath.
- 2
Open the arms
Exhale and raise both arms out and slightly back until they align near torso height.
Breathing: Exhale through the effort.
- 3
Lower beneath the shoulders
Inhale and lower the dumbbells slowly without changing the hip hinge.
Breathing: Inhale through the controlled return.
Common mistakes to avoid
Starting before the setup is stable
Do not rush the first position. Hold two dumbbells, hinge forward with a neutral spine, and let the arms hang below the shoulders. Make that setup feel repeatable before adding speed or resistance.
Letting the working position drift
Keep your starting alignment consistent through the rep. If another part of the body has to swing or twist, reduce the load or range.
Rushing the return
The return is part of the exercise, not a pause between efforts. Inhale and lower the dumbbells slowly without changing the hip hinge.
Forcing a range you cannot control
Standing hip hinge with neutral spine; closed neutral grip; elbows softly bent; arms open to torso height; no torso rise.
Sets, reps, and rest
Start with 2–4 sets of 10–15 smooth repetitions. Rest 45–90 seconds between sets. Use enough resistance to feel the target muscles without shortening the range or borrowing momentum from the rest of your body.
Treat this as a starting framework. Your load and volume should match your current technique, recovery, and training plan.
Rear Delt Fly questions
Is Rear Delt Fly suitable for beginners?
Rear Delt Fly is classified as a beginner-level movement in this guide. The movement has a clear, scalable pattern. Start light, learn the positions in order, and progress only while every repetition remains controlled.
What muscles does Rear Delt Fly work?
Rear Delt Fly primarily works rear delts, with rhomboids, middle traps, and rotator cuff assisting or stabilizing the movement.
What equipment do I need for Rear Delt Fly?
You need a pair of dumbbells. Set everything up securely before the first repetition.
