The chest fly is an upper-body exercise that trains the chest through a wide hugging motion. It can be done with dumbbells, cables, bands, or a machine.
The movement is simple, but it should not be rushed. Use a light to moderate load, keep a soft bend in your elbows, and stop the lowering phase before your shoulders feel strained.
What the Chest Fly Trains
The chest fly mainly targets the chest muscles. Depending on the version, your shoulders and arms also help control the movement.
It is usually best used as an accessory exercise after a main press, not as the only chest movement in a program. Balance pressing work with pulling exercises such as rows; this barbell row guide is one option for the opposite pattern.
How To Do A Dumbbell Chest Fly
- Lie on a flat bench with a dumbbell in each hand.
- Start with the dumbbells over your chest and palms facing each other.
- Keep a slight bend in your elbows.
- Lower your arms out to the sides until you feel a comfortable chest stretch.
- Bring the dumbbells back over your chest under control.
Keep the movement smooth. If your elbows straighten, shoulders pinch, or back arches hard, reduce the weight.
Common Mistakes
Going Too Heavy
The fly uses a long lever arm, so heavy weights can quickly pull you out of position. Choose a load you can control through the full rep.
Lowering Too Far
You do not need to chase an extreme stretch. Stop when the chest is comfortably stretched and your shoulders still feel stable.
Turning It Into A Press
If your elbows bend and straighten a lot, you are doing more of a press. Keep the elbow angle mostly fixed.
Holding Your Breath
Brace, but keep breathing. Exhale as you bring the weights together and inhale as you lower with control.
Chest Fly Variations
Floor Chest Fly
The floor limits your range of motion, which can make the exercise easier to control.
Machine Chest Fly
A machine provides a fixed path. Adjust the seat and handles so your shoulders feel comfortable before starting.
Around-the-World Variation
This variation uses a larger arm path and should be done lightly. Skip it if it bothers your shoulders.
How to Program It
Try 2 to 3 sets of 8 to 15 controlled reps. Place chest flyes after heavier pressing or use them in a lighter upper-body session.
If your chest fly gets sloppy, the set is finished. Better reps matter more than heavier dumbbells.