What should I feel during Rear-delt DB fly (chest-supported)?

Rear delts contracting at the top — no trap shrug or elbow bend assist.

What are common mistakes with Rear-delt DB fly (chest-supported)?

Elbows bending to increase weight; Shrugging traps at the top; Partial ROM not reaching shoulder height

How do I progress Rear-delt DB fly (chest-supported)?

Add weight only when the hold at the top is clean and stable.

What can I do instead of Rear-delt DB fly (chest-supported)?

Face pull, Lu Xiaojun lateral (heavy + cheat eccentric), Cable rear-delt fly

Rear-delt DB fly (chest-supported)

Chest on incline bench, DBs hanging, arc out to shoulder height, hold 1 s.

family=rear delt fly chest supportedpattern=rear-delt isolationforce=pullmechanic=isolationequipment=free_weight

Muscles

muscle emphasis · training guidance

rear deltsPRIME

rhomboids68

mid-traps56

Primary: rear delts
Supporting: rhomboids, mid-traps

Mechanics

Pattern: rear-delt isolation
Equipment: dumbbell
Geometry: Variable Range
Target feel: Rear delts contracting at the top — no trap shrug or elbow bend assist.
Progression: Add weight only when the hold at the top is clean and stable.
Regression: Cable rear-delt fly — lighter and easier to control path.

Common errors

Elbows bending to increase weight
Shrugging traps at the top
Partial ROM not reaching shoulder height

Programming by goal

Goal	Sets × reps	Effort cap	Tempo
Strength	3 × 3-6	RPE ≤ 9	2-0-X-0
Muscle growth	3 × 8-12	RPE ≤ 8	3-1-1-0
Endurance	3 × 15-25	RPE ≤ 7	2-0-2-0

Engine defaults for one exercise. Adjust load so every rep stays within the listed effort cap.

Equipment context

Dumbbells allow a longer range of motion and independent arm movement, which can reveal side-to-side differences.

Substitutions

Face pull
Lu Xiaojun lateral (heavy + cheat eccentric)
Cable rear-delt fly

High-cable reverse fly Same pattern: rear-delt isolation
Arnold press Shared equipment: dumbbell
B-stance RDL Shared equipment: dumbbell
Back squat Same equipment category: free_weight
Barbell bench press Same equipment category: free_weight

See all 13 rear delts exercises in the Atlas

Progression ladder

Beginner / regression: Cable rear-delt fly — lighter and easier to control path.
Standard: Rear-delt DB fly (chest-supported)
Advanced / progression: Add weight only when the hold at the top is clean and stable.

Atlas metrics

Movement pattern: rear-delt isolation
Primary target: rear delts
Supporting muscles: rhomboids, mid-traps
Equipment: dumbbell
Joint geometry: Variable Range
Alternatives: 3 substitutions

Evidence & limits

Last reviewed against peer-reviewed biomechanics references. Exercise descriptions are framed as training guidance, not medical advice.

Source: ExRx.net Exercise & Muscle Directory

Eccentryx is fitness software. It is not a medical device and is not intended to diagnose, treat, cure, or prevent any disease, injury, or medical condition. Consult a licensed physician before beginning any exercise program.

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FAQ

How do I set up Rear-delt DB fly (chest-supported)?: Chest on incline bench, DBs hanging, arc out to shoulder height, hold 1 s.
What should I feel during Rear-delt DB fly (chest-supported)?: Rear delts contracting at the top — no trap shrug or elbow bend assist.
What are common mistakes with Rear-delt DB fly (chest-supported)?: Elbows bending to increase weight; Shrugging traps at the top; Partial ROM not reaching shoulder height
How do I progress Rear-delt DB fly (chest-supported)?: Add weight only when the hold at the top is clean and stable.
What can I do instead of Rear-delt DB fly (chest-supported)?: Face pull, Lu Xiaojun lateral (heavy + cheat eccentric), Cable rear-delt fly