Incline Dumbbell Fly
The incline dumbbell fly is a chest isolation exercise performed on a bench set at about 30°, opening the arms out to the sides in a wide arc and sweeping them back together over the chest. It works the upper chest through a loaded stretch, with the front of the shoulders assisting.
Also called: Incline Fly, Incline DB Fly, Incline Dumbbell Flye, Incline Chest Fly · Equipment: dumbbell · Pattern: push
Step by step
- Set the bench to about 30° and sit with a dumbbell on each thigh.
- Lie back and kick the dumbbells up so they sit over your upper chest, arms straight but not locked and palms facing each other. Plant your feet flat on the floor.
- Pull your shoulder blades back and down into the bench.
- Bend your elbows slightly, about 15–20°, and hold that angle for the whole set.
- Open your arms out to the sides in a wide arc under control, until you feel a stretch across your chest with your upper arms roughly level with your torso.
- Sweep the dumbbells back up along the same arc, squeezing the upper chest, and finish just before the bells touch over your chest.
- After the last rep, bring the bells together, bend your elbows to rest them on your chest, then rock up to sitting with the dumbbells on your thighs.
- Slight fixed bend in the elbows, about 15–20°
- Shoulder blades back and down, pinned to the bench
- Open wide until the upper arms are level with your torso
- Sweep the bells up and together over your upper chest
- Slow on the way out, same arc on the way back
In VALDA, these cues are one tap away on the exercise while you train.
What it trains
| Muscle | Role | Evidence |
|---|---|---|
| Pectoralis major: clavicular (upper) | Prime mover | C |
| Pectoralis major: sternocostal (mid) | Prime mover | C |
| Anterior deltoid: anterior | Secondary | C |
| Pectoralis major: abdominal (lower) | Secondary | C |
| Biceps brachii: short head | Stabiliser | D |
| Pectoralis minor | Stabiliser | D |
Evidence grades: A = strong research base · B = good · C = limited · D = coaching consensus.
What goes wrong, and the fix
Elbows bending and straightening each rep
Fix: Set a slight elbow bend of about 15–20° and hold it for every rep.
Going too deep
Fix: Open the arms until your upper arms are level with your torso, no further.
Shoulder blades lifting off the bench
Fix: Pin your shoulder blades back and down before the first rep.
Bench set too steep
Fix: Set the bench at about 30° for an upper-chest fly.
Dropping into the bottom
Fix: Open the arms slowly under control, then sweep them back up the same arc.
What the research says
Muscle growthGeneral fitnessEndurance
- Fly versus press — In trained men at 6RM loads, the bench press produced greater chest, front-shoulder and triceps activation than the dumbbell fly. Lifters commonly place the fly after pressing as an accessory.
- Bench angle — EMG research on the press finds upper-chest activation peaks around a 30° incline and front-shoulder activity rises above 45°. No study has measured fly angle directly.
- Load and effort — Research finds muscle growth is similar across a wide range of loads when sets are taken close to failure, so the fly's modest load ceiling suits moderate-to-high rep sets.
- Volume and frequency — Research links more weekly sets for a muscle to more growth, with diminishing returns, and training a muscle about twice a week is a common way to spread that volume.
- Range of motion — Meta-analyses find full range of motion gives equal or greater gains than partial range, although upper-body growth comparisons are less clear.
Swap it mid-workout
With VALDA Pro, FLEX offers alternatives like these when you swap an exercise mid-workout.
Log the incline dumbbell fly in VALDA, with these cues one tap away while you train and your history for it in one place.
General information about exercise technique, not medical advice. If you have an injury or a health condition, your healthcare provider is the right person to ask.