What should I feel during Flat dumbbell fly?

Pure chest stretch at bottom; squeeze as if hugging a barrel on the way up.

What are common mistakes with Flat dumbbell fly?

Turning it into a press — elbows straightening under load; Going too heavy and losing the arc path; No squeeze at the top

How do I progress Flat dumbbell fly?

Pause at the bottom stretch for 1–2 seconds before closing.

What can I do instead of Flat dumbbell fly?

Cable fly mid, Pec deck machine, Cable fly low-to-high

Flat dumbbell fly

Lie flat, slight elbow bend, lower bells in a wide arc until chest stretches.

family=flypattern=chest isolationforce=pushmechanic=isolationequipment=free_weight

Muscles

muscle emphasis · training guidance

chestPRIME

front delts68

Primary: chest
Supporting: front delts

Mechanics

Pattern: chest isolation
Equipment: dumbbells, bench
Geometry: Variable Range
Target feel: Pure chest stretch at bottom; squeeze as if hugging a barrel on the way up.
Progression: Pause at the bottom stretch for 1–2 seconds before closing.
Regression: Cable fly at chest height - constant tension with more controlled stretch.

Common errors

Turning it into a press — elbows straightening under load
Going too heavy and losing the arc path
No squeeze at the top

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

Cable fly mid
Pec deck machine
Cable fly low-to-high

Svend press Same pattern: chest isolation · Same equipment category: free_weight
Cable fly Same pattern: chest isolation
Band crossover fly Same pattern: chest isolation
Doorway pec stretch Same pattern: chest isolation
Low-to-high cable fly Same pattern: chest isolation

See all 37 chest exercises in the Atlas

Progression ladder

Beginner / regression: Cable fly at chest height - constant tension with more controlled stretch.
Standard: Flat dumbbell fly
Advanced / progression: Pause at the bottom stretch for 1–2 seconds before closing.

Atlas metrics

Movement pattern: chest isolation
Primary target: chest
Supporting muscles: front delts
Equipment: dumbbells, bench
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 Flat dumbbell fly?: Lie flat, slight elbow bend, lower bells in a wide arc until chest stretches.
What should I feel during Flat dumbbell fly?: Pure chest stretch at bottom; squeeze as if hugging a barrel on the way up.
What are common mistakes with Flat dumbbell fly?: Turning it into a press — elbows straightening under load; Going too heavy and losing the arc path; No squeeze at the top
How do I progress Flat dumbbell fly?: Pause at the bottom stretch for 1–2 seconds before closing.
What can I do instead of Flat dumbbell fly?: Cable fly mid, Pec deck machine, Cable fly low-to-high