Pec deck
A seated fly machine that trains the chest through a wide arc with a stable path.
- Muscle group: Chest
- Equipment: Machine
- Difficulty: Beginner
Also known as: Pec deck fly, Machine fly, Butterfly machine, Butterfly-maskine, Brystflyes i maskine
How to do it
- Set the seat so the handles are at chest height and sit with your back against the pad.
- With a slight bend in the elbows, bring the handles together in front of your chest.
- Open the arms slowly until you feel a comfortable stretch, without going past it.
Common mistakes
- Bending and straightening the elbows so it becomes a press.
- Letting the arms swing too far back and strain the shoulders.
Alternatives
Watch a video demonstration on YouTube
“How To Use The Chest Fly Machine” by PureGym (opens YouTube)
Log this exercise in FitScore
See your previous sets while you train, get a suggested next load and personal records when you beat your best.
Free to start – no card needed.
General technique guidance, not individual advice. Stop if something hurts and talk to a professional about injuries.