Dumbbell One Arm Floor Fly
- Músculo objetivo
- Pectoralis Major Clavicular Head, Pectoralis Major Sternal Head
- Músculos sinergistas
- Biceps Brachii, Deltoid Anterior
- Equipamiento
- Dumbbell
- Parte del cuerpo
- Chest
- Tipo
- Strength
The dumbbell one arm floor fly is a single-arm chest isolation exercise that targets the pectoralis major (both the clavicular and sternal heads), with help from the front deltoid and biceps. Performed lying on the floor with one dumbbell, the floor naturally limits how far your elbow can drop, making it a controlled, joint-friendly way to train the chest one side at a time.
Cómo hacer el Dumbbell One Arm Floor Fly
- 1Lie flat on the floor holding a dumbbell in one hand, feet planted and knees bent for a stable base.
- 2Press the dumbbell up over your chest with your arm extended and a soft, slight bend in the elbow.
- 3Turn your palm to face inward toward the midline and brace your core to keep your torso flat.
- 4Open your arm out to the side in a wide arc, lowering the dumbbell until your upper arm or elbow lightly touches the floor.
- 5Pause briefly at the bottom — the floor sets your end range, so let it stop the movement rather than reaching for more depth.
- 6Squeeze your chest to bring the dumbbell back up along the same arc until it is over your chest again.
- 7Complete all your reps on this side, then switch the dumbbell to the other hand and repeat.
Consejos de técnica
- Keep a fixed, slight elbow bend throughout — the arm hinges at the shoulder, not the elbow, so the work stays on the chest.
- Let the floor be your stop: when your elbow or upper arm contacts it, that is full range, so there is no need to force a deeper stretch.
- Move the dumbbell in a wide arc, not a straight press, to keep tension on the pec rather than shifting it to the triceps.
- Brace your core and keep your free hand on the floor or your hip so your torso does not rotate toward the working side.
Errores comunes
- Slamming the elbow into the floor at the bottom, which jars the shoulder and removes control from the rep.
- Bending and straightening the elbow like a press, which turns the fly into a triceps movement and takes load off the chest.
- Using too heavy a dumbbell so the arm collapses inward and the torso twists, costing tension and stressing the shoulder.
- Letting the working arm drift toward your face or hips instead of staying level with your chest, which shortens the pec's working range.
Preguntas frecuentes
What muscles does the dumbbell one arm floor fly work?
It primarily works the chest (pectoralis major, both the clavicular and sternal heads), with the front deltoid and biceps assisting as synergists. Training one arm at a time also forces your core to resist rotation.
Why do the floor fly instead of a bench fly?
The floor stops your elbow before it drops too far, which limits the range of motion and protects the shoulder from an excessive stretch. That makes it a good option if you have no bench or want a more joint-friendly fly.
How heavy should the dumbbell be?
Go lighter than you would for a press. Pick a weight you can lower in a controlled arc and stop softly on the floor, keeping your torso flat and a steady slight bend in the elbow.
Is the dumbbell one arm floor fly good for beginners?
Yes. The floor caps the range and the single-arm setup keeps the load light and controlled, so it is an accessible way to learn the fly pattern and build chest tension before progressing to a bench.
