Incline Dumbbell Flyes

Set a bench to a 30-45 degree incline and lie back with a dumbbell in each hand, arms extended above your upper chest with palms facing each other. Lower the dumbbells in a wide arc until you feel a stretch across your upper chest, then squeeze the dumbbells back together above your chest.

Pro Tips

• A 30-degree incline targets upper chest best; steeper angles shift emphasis to the front delts
• Lower the weights slowly to maximise the stretch
• Retract your shoulder blades into the bench for a stable base

Muscles worked

Primary: Pectoralis major — specifically the clavicular (upper) fibres when the bench is set to 30–45 degrees. The fly movement loads the pec through shoulder horizontal adduction (bringing the arms together across the chest), which is distinct from the elbow extension emphasis of pressing movements.

Supporting: Anterior deltoid (assists at the top of the arc), serratus anterior (protraction at lockout), coracobrachialis (minor stabilisation).

Common mistakes

Arms too straight: Keeping the elbows fully locked loads all the stretch force onto the shoulder capsule, not the chest. Maintain a soft, fixed elbow bend (15–20 degrees) throughout the movement — the angle should not change as you fly.

Going too heavy: Flyes are a stretch-loaded isolation movement, not a compound press. Using too much weight shortens the range of motion and forces a pressing pattern that loses the distinctive arc. Lighter weight through a full arc stimulates the chest more than heavy weight through a partial one.

Bench angle too steep: Above 45 degrees the emphasis shifts strongly toward the anterior deltoid rather than the upper chest. 30 degrees is the sweet spot for clavicular pec loading.

Dumbbells touching at the top: Allowing the dumbbells to meet at the top removes tension entirely at the moment of peak contraction. Stop just short of contact and return — keep the chest under load throughout.

Programming notes

Incline dumbbell flyes are almost exclusively an accessory or finishing exercise, rarely used as a primary chest movement. They work best after pressing movements have established the heavy load, used to target the upper chest through a stretch-loaded range of motion that pressing cannot replicate.

Typical programming: 3–4 sets of 12–15 repetitions with a deliberate lower tempo. They are particularly effective as the final exercise in an upper chest or push session, where the goal is a thorough stretch and contraction rather than additional load.

Frequently asked questions

What bench angle is best for incline dumbbell flyes?

Set the bench between 30 and 45 degrees — 30 degrees is the sweet spot for isolating the clavicular (upper) head of the pectoralis major. As you raise the angle past 45 degrees, the anterior deltoid takes over and the upper chest stimulus drops off sharply. If your bench has fixed positions, choose the lower setting rather than the higher one.

How much weight should I use for incline dumbbell flyes?

Use far less than you would for pressing movements — most lifters need to drop 40–60% of their press weight to maintain the correct arc and full range of motion. The goal is to feel a deep stretch across your upper chest at the bottom of each rep. If your elbows are bending more to manage the load or your range shortens, the weight is too heavy. Ego has no place in a fly.

Should incline dumbbell flyes replace incline press in my programme?

No. Flyes and pressing movements are complementary, not interchangeable. The incline press moves more weight and drives mechanical tension through elbow extension; the fly loads the chest through a wider arc of horizontal adduction that pressing cannot replicate. Use the press as your primary upper chest movement and place flyes after it as an accessory to deepen the stretch stimulus and finish the session.