Dumbbell One Arm Low Fly
- Synergistenmuskeln
- Biceps Brachii, Deltoid Anterior
- Equipment
- Dumbbell
- Körperregion
- Chest
- Typ
- Strength
The dumbbell one arm low fly is a single-arm chest isolation exercise that emphasizes the upper chest (pectoralis major, clavicular head) while also working the lower and mid fibers (sternal head). You sweep one dumbbell on a wide low-to-high arc across your body, with the front shoulder and biceps assisting. Training one side at a time builds the upper-chest sweep and helps even out left-to-right imbalances.
Dumbbell One Arm Low Fly: So führst du sie aus
- 1Stand tall with your feet about shoulder-width apart, holding a single dumbbell in one hand down by the opposite hip.
- 2Brace your core, keep your chest up, and set a soft, fixed bend in your working elbow.
- 3Rest your free hand on your hip or thigh for balance and keep your torso upright throughout.
- 4Sweep the dumbbell up and across your body in a wide arc, leading with your upper chest rather than your arm.
- 5Bring the dumbbell up toward the opposite shoulder, squeezing the upper chest hard at the top of the arc.
- 6Lower the dumbbell back down to the starting hip under control along the same path, feeling the stretch across your chest.
- 7Complete all reps on one side, then switch the dumbbell to the other hand and repeat for an equal number of reps.
Technik-Tipps
- Keep a slight, fixed bend in your elbow throughout the movement so the work stays on the chest and off the elbow joint.
- Drive the sweep with your chest by thinking about pulling your upper arm across your body, not curling the weight up.
- Pause briefly and squeeze at the top of each rep to maximize the upper-chest contraction instead of throwing the weight.
- Pick a lighter dumbbell than you would press with — the long lever of a fly makes the chest, not raw strength, the limiting factor.
Häufige Fehler
- Bending and straightening the elbow like a press, which turns the fly into a partial curl or press and shifts tension off the chest.
- Using momentum to swing the dumbbell up, which lets the front delt and biceps take over from the targeted pec.
- Going too heavy, which forces the shoulder to compensate and overstretches the joint at the bottom of the arc.
- Cutting the range short at the bottom, which skips the stretch where much of the chest-building stimulus comes from.
Häufig gestellte Fragen
What muscles does the dumbbell one arm low fly work?
It primarily works the chest, with the low-to-high arc emphasizing the upper chest (pectoralis major, clavicular head) alongside the lower and mid fibers (sternal head). The front deltoid and biceps assist as synergists.
Why train one arm at a time instead of both?
Working one arm lets you focus fully on the squeeze and stretch of each pec and helps even out side-to-side strength imbalances, since the stronger side can't compensate for the weaker one.
Is the low fly good for building the upper chest?
Yes. The low-to-high path means your arm sweeps upward across the body, which biases the clavicular (upper) head of the chest more than a flat or high-to-low fly.
How many sets and reps should I do?
As an isolation move, 3–4 sets of 10–15 reps per arm with a controlled tempo works well. Use a weight you can move through a full arc without bending the elbow.
How heavy should the dumbbell be?
Lighter than you'd use for pressing. The fly's long lever and fixed elbow make the chest the limiting factor, so choose a weight you can control for a full arc and a squeeze at the top.
