Chest Exercise · Dumbbell

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Dumbbell One Arm Chest Fly On Exercise Ball

Combining a one-arm fly with a stability ball adds a real balance and anti-rotation challenge to what's already a unilateral chest exercise. The chest still gets the primary stretch-and-squeeze stimulus, but a meaningful amount of effort goes into staying stable on the ball. Keep the weight light — this is a control exercise as much as a chest builder.

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Also known as: Db One Arm Chest Fly On Exercise Ball, Dumbell One Arm Chest Fly On Exercise Ball

Category

Chest

Equipment

Dumbbell

Target

Pectorals

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Exercise reference published by PlanWorkouts; see our editorial standards.

How to Do the Dumbbell One Arm Chest Fly On Exercise Ball

1. Sit on an exercise ball holding a dumbbell in one hand, feet planted on the floor.
2. Walk your feet forward, letting the ball roll until your upper back rests on it with your head, neck, and shoulders extending past the ball.
3. Press that arm straight up above your chest, holding the dumbbell with your palm turned inward.
4. Lower the dumbbell out to the side gradually, keeping a slight bend at the elbow.
5. Hold briefly once your arm reaches parallel with the floor.
6. Contract your chest to pull the dumbbell back to the starting position.
7. Continue for your target number of reps, then switch to the other arm.

Technique & Form Tips

Move your arms in a controlled arc toward the front of your body, focusing on horizontal adduction. Follow the demonstrated elbow angle and body support, ensuring your range of motion remains within your personal comfortable limits.

Common Mistakes to Avoid

• Turning fly into a press: Keep the demonstrated elbow bend instead of repeatedly bending and straightening the elbows to press the load.
• Overstretching: Limit the backward movement of your arms to a range that feels stable and comfortable.
• Rushing the contraction: Use a controlled tempo through the entire range, especially as your hands move toward the center.

How to Breathe During This Exercise

Coordinate your breath with the opening and closing phases of the movement.

Comfort and Control

Choose a load and range you can control. Stop if the movement causes pain. If discomfort persists, stop and ask a qualified professional about an appropriate exercise and range.

General guidance: Mayo Clinic on weight-training technique. Follow the specific movement steps above for this variation.

Muscles Worked

The Dumbbell One Arm Chest Fly On Exercise Ball mainly targets your Pectorals, with your Shoulders helping support the movement, along with your Triceps.

More Chest Exercises

Archer Push Up Body Weight · Pectorals Assisted Chest Dip (kneeling) Leverage Machine · Pectorals Assisted Seated Pectoralis Major Stretch With Stability Ball Assisted · Pectorals Assisted Wide-Grip Chest Dip (kneeling) Leverage Machine · Pectorals Band Bench Press Band · Pectorals Band One Arm Twisting Chest Press Band · Pectorals

More Pectorals Exercises

Barbell Bench Press Barbell · Pectorals Barbell Decline Bench Press Barbell · Pectorals Barbell Decline Pullover Barbell · Pectorals Barbell Decline Wide-Grip Press Barbell · Pectorals Barbell Front Raise And Pullover Barbell · Pectorals Barbell Guillotine Bench Press Barbell · Pectorals

Equipment Alternatives

Don't have dumbbell? These target the same pectorals with different equipment.

Cable Decline Fly Cable · Pectorals Floor Fly (with Barbell) Barbell · Pectorals Lever Seated Fly Leverage Machine · Pectorals

FAQ

What muscles does the Dumbbell One Arm Chest Fly On Exercise Ball work?

The Dumbbell One Arm Chest Fly On Exercise Ball mainly works your pectorals. It also helps strengthen your shoulders and triceps. Using good, smooth form makes sure you work the right muscles and avoid unnecessary strain on your joints.

What equipment do I need for the Dumbbell One Arm Chest Fly On Exercise Ball?

You do the Dumbbell One Arm Chest Fly On Exercise Ball with a dumbbell. Make sure your equipment is set up safely before starting. If you work out at home or have limited gear, check out our alternative exercises below.

What form mistake should I watch for on the Dumbbell One Arm Chest Fly On Exercise Ball?

One mistake to watch for is turning fly into a press: Keep the demonstrated elbow bend instead of repeatedly bending and straightening the elbows to press the load.. Use a comfortable range and a controlled return; reduce the load if you cannot maintain the demonstrated setup.

How many sets and reps should I perform on the Dumbbell One Arm Chest Fly On Exercise Ball?

To tone and grow muscle, do 3 to 4 sets of 10 to 15 smooth reps with 60 seconds of rest, focusing on a full stretch and squeezing the muscle at the top of each rep.

What's a good alternative to the Dumbbell One Arm Chest Fly On Exercise Ball?

The Cable Decline Fly trains your pectorals with cable and a similar movement pattern. Review its form guide before substituting it, since setup and range of motion can differ.