Dumbbell Floor Fly: how to do it right
In short: Dumbbell fly lying on the floor, a chest isolation loaded in the stretch position, with range of motion limited by the floor.
How to do it, step by step
- 1Lie on the floor, dumbbells straight above your chest, elbows slightly bent and fixed.
- 2Open the arms outward in an arc, let the pec stretch until your elbows or triceps brush the floor.
- 3Brake this opening phase over 2 to 3 seconds, with no jerk or bounce off the floor.
- 4Bring the dumbbells back up along the same arc, as if hugging a tree trunk.
- 5Keep the same elbow angle from start to finish, never close it.
The mistake to avoid
Don't bend your elbows to press, or the fly turns into a press.
Other common mistakes
- Bending the elbows more and more to cheat: keep them fixed, otherwise you turn the fly into a press and the pec no longer isolates.
- Going too heavy and letting the arms drop: lighten up, loaded stretch demands total control in the low position.
- Bouncing the elbows off the floor to restart: set them down gently or stop just before, the bounce breaks the tension and weakens the shoulder.
- Opening too fast: slow down the lengthening phase to 2 to 3 seconds to capture the full stimulus.
Muscles worked
- Main:
- Chest
The pec major, especially its sternocostal fibers (the middle of the chest), does all the work: it brings the arms toward the midline. The pec minor and the anterior delt assist lightly as stabilizers, but the goal remains isolating the pec, with no marked triceps involvement.
What to replace it with
Same muscle, same part of the movement: these exercises do the same job.
- Flat Dumbbell Fly ›
- Dumbbell Bench Press ›
- Archer Push-Up on Handles ›
- Deficit Hands-Elevated Push-Up ›
- Wide-Grip Push-Up on Handles ›
Frequently asked questions
How do I do this exercise?
Lie on the floor, dumbbells straight above your chest, elbows slightly bent and fixed. Open the arms in an arc until your triceps brush the floor, braking over 2 to 3 seconds. Come back up along the same arc, as if hugging a tree trunk.
How low do I go?
Until your triceps brush the floor. The floor is your safety limit and it's well placed: never try to go beyond it by sinking your shoulders.
I don't feel anything, is that normal?
You should feel a clear chest stretch at the bottom, and a squeeze at the top. Imagine you're crushing an orange between your pecs at the top. If you only feel your shoulders, lighten up and reduce the opening a bit.
How fast should I do the movement?
Brake the opening over 2 to 3 seconds, set the elbows down gently or stop just before the floor. The slow tempo on the opening is your best ally here: it's the only phase that really counts.