Chest · Machine
Machine Chest Flyes
How to do the machine chest flyes, the muscles it works, and the mistakes to avoid. Pulled straight from the Kovo app's exercise library.
- Equipment
- Machine
- Difficulty
- Beginner
- Logged as
- Weighted reps
- Movement
- Fly
- Mechanic
- Isolation
See it in motion
How to do it
Sit on a pec deck machine with your forearms resting against the pads. Push the pads together in front of your chest by bringing your elbows closer, squeezing your chest muscles. Slowly return to the starting position, feeling the stretch in your chest.
- 1Sit with your arms on the pads and bring them together in front of your chest, feeling a deep contraction in your pecs
- 2Keep a slight bend in your elbows and pause briefly when the pads meet
- 3Control the return to feel a stretch through your chest without losing tension
Common mistakes
- Don't let the weight stack crash between reps or use momentum to swing the arms
- Avoid leaning forward or rounding your shoulders; maintain a neutral spine
- Don't overstretch at the back if it causes shoulder discomfort
Muscles worked
The machine chest flyes mainly works the mid chest, with the upper chest, lower chest, and front delts assisting.
- Mid ChestPrimary
- Upper ChestSupport
- Lower ChestSupport
- Front DeltsSupport
- BicepsMinor
- ForearmsMinor
Kovo programs the machine chest flyes for you and tracks it every session.
The AI builds your whole program, drops the right lifts into each workout, and adjusts your weights as you get stronger. Free on iOS and Android.
More chest exercises
- How to do the barbell bench press
- How to do the leverage machine bench press
- How to do the cable chest flyes
- How to do the chest dip
- How to do the machine chest press
- How to do the close-grip bench press
Last reviewed April 2026.