Dumbbell Fly

Why it matters

Because the elbows stay relatively fixed throughout the movement rather than bending and extending like a press, the fly isolates the chest more directly, with much less assistance from the triceps. This makes it a useful complement to pressing movements — a way to add chest-specific volume without additional fatigue to the arms.

How to do it

1. Lie on the bench holding a dumbbell in each hand above your chest. Arms extended with a slight, fixed bend in the elbows — palms facing each other.
2. Lower the dumbbells out to the sides in an arc. Keep the slight elbow bend constant throughout, lowering until you feel a stretch across your chest.
3. Don't lower past a comfortable stretch. Going too low can strain the shoulder joint — stop where you feel the stretch, not where your arms happen to stop.
4. Bring the dumbbells back together in the same arc. Squeeze your chest to bring the weights back above your chest, maintaining the same elbow angle.

Common mistakes

• Bending the elbows more during the lift. If your elbows bend further as you lower the weight, you're turning the fly into a press and losing the isolation benefit.
• Using too much weight. The fly puts the shoulder in a vulnerable position under heavy load — this exercise should always use lighter weight than your pressing movements.
• Lowering too far. Going past a comfortable stretch increases shoulder strain without adding muscle benefit.
• Losing the arc and pressing straight up instead. The fly's value comes from the arcing path — pressing straight up turns it into a different, less targeted exercise.

Sets & reps by level