Incline dumbbell fly

Also called incline dumbbell flye, incline chest fly, incline dumbbell flies.

What is an incline dumbbell fly?

The incline dumbbell fly is a chest isolation exercise performed on an inclined bench. With a small, fixed bend in the elbows, you open the arms in a wide arc and bring the dumbbells back above the upper chest.

Anatomical illustration of an incline dumbbell fly at the open and closed positions, with the chest highlighted.

How do you perform an incline dumbbell fly?

Set up

  1. Set a bench to a low or moderate incline and sit with a dumbbell resting on each thigh.
  2. Lie back, bring the dumbbells above your upper chest and plant your feet.
  3. Turn your palms toward each other and set a small bend in your elbows.

Execution

  1. Open your arms in a wide arc while keeping the elbow angle nearly unchanged.
  2. Stop when you reach a controlled chest stretch or before the shoulders become uncomfortable.
  3. Reverse the same arc to bring the dumbbells above the upper chest without turning the movement into a press.

Common mistakes

  • Bending and straightening the elbows

    Changing the elbow angle turns the fly into a dumbbell press and makes the path hard to repeat.

  • Lowering past a controllable range

    More depth is not useful when the shoulders roll forward or the weight pulls the arms beyond a comfortable position.

  • Using a bench angle that is too steep

    As the bench approaches upright, the movement becomes increasingly shoulder-dominant instead of matching the upper-chest fly shown here.

Where it fits in a session

After pressing work in a chest or upper-body session.

Use a lighter load than you would press. The set should end because the chest can no longer control the arc, not because the elbows bend to rescue the dumbbells.

Muscles worked

Front
Front — Schematic surface view. Some muscles are partly visible or not shown.
Back
Back — Schematic surface view. Some muscles are partly visible or not shown.

Primary

Secondary

Schematic surface view. Some muscles are partly visible or not shown.

The inclined arm path places the clavicular portion of the pectoralis major in the lead, while the rest of the chest and the front deltoids assist.

Variations

  • Two-frame anatomical illustration of a flat-bench dumbbell fly on a white background. In the left frame, a man lies on a flat bench with his feet on the floor and holds a dumbbell in each hand. His arms are open wide at chest level with a small bend in both elbows and his palms facing inward. In the right frame, the same man has brought the dumbbells together above his chest while keeping the slight elbow bend. The pectoralis major is shaded bright red in both frames. Lighter shading also appears over the front of the shoulders, biceps and parts of the forearms.
    Flat dumbbell flyUses a flat bench and brings the arc over the middle of the chest.
  • Incline cable flyUses cables to keep resistance through more of the closing arc.
  • Anatomical illustration of a man pressing two dumbbells while lying back on a bench inclined at roughly forty-five degrees, shown twice side by side on a white background. In the left frame his arms are straight overhead and the two dumbbells are almost touching. In the right frame he is at the bottom of the rep, the dumbbells level with his chest and his elbows out from his torso, palms facing forward. The muscles of the chest and the front of the shoulder are shaded red in both frames, most strongly in the upper chest running from the collarbone out to the shoulder; the rest of the body is drawn in plain white. The back of the upper arm is not highlighted. The bench angle, the elbow position and the palms-forward grip shown are one option among several, not the required way to do the movement.
    Incline dumbbell pressBends and straightens the elbows to press rather than keeping a fly arc.
  • Incline single-arm dumbbell flyMoves one dumbbell at a time while the other arm stays out of the repetition.

Frequently asked questions

What muscles does the incline dumbbell fly work?

It mainly trains the clavicular, or upper, portion of the pectoralis major. The rest of the chest and the front deltoids assist the movement.

What bench angle should I use?

Use a low or moderate incline that lets the dumbbells meet above the upper chest without turning the movement into an overhead fly. The exact angle can vary with the bench and your shoulder comfort.

How is an incline fly different from an incline press?

A fly keeps a small, nearly fixed elbow bend and moves the arms in a wide arc. A press bends the elbows as the weights lower and straightens them as the weights rise.

How low should the dumbbells go?

Lower until you feel a controlled chest stretch, stopping earlier if the shoulders roll forward or feel uncomfortable. The illustration shows one workable range, not a depth everyone must copy.

Should the dumbbells touch at the top?

They can finish close together above the upper chest, but they do not need to touch. Keep the shoulders on the bench instead of reaching farther just to meet the weights.

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