Stability Ball Single Leg Dumbbell Fly
In SetGrip: Dumbbell Fly (Stability Ball, Single Leg)
Lifting one foot off the floor while flying on the ball narrows your base to a single leg plus the ball itself, so the set is won or lost at the hips before the chest ever matters. Save it for light dumbbells and slow tempos; as chest work it is inefficient, as a balance challenge it is honest.
How to do the Stability Ball Single Leg Dumbbell Fly
- Sit on an exercise ball with a dumbbell in each hand, palms facing each other.
- Place one foot on the ground and extend the other leg straight out in front of you.
- Lean forward slightly and bring your arms out to the sides, keeping a slight bend in your elbows.
- Slowly lower the dumbbells down and out to the sides, feeling a stretch in your chest.
- Pause for a moment at the bottom, then squeeze your chest muscles to bring the dumbbells back up to the starting position.
- Repeat for the desired number of repetitions, then switch legs and repeat.
Tip: Imagine hugging a barrel rather than pushing a weight.
Muscles worked
Primary
Pectorals · Chest
On chest flies and cable crossovers the pecs pull the arms together in an arc and should feel a deep stretch at the bottom and a hard squeeze at the top.
Common mistakes
- Elbows bending as you tire — this turns a fly into a press; set the elbow angle at the start and keep it constant for the whole set.
- Going too heavy — flies are a stretch and squeeze movement, not a strength lift; you should be able to pause at the bottom without the shoulders rolling forward.
- Stopping short of the stretch — let the arms open until you feel the chest or rear delts lengthen, then bring them back under control.
- Not squeezing at the finish — the last few inches are where the muscle shortens most, so hold the contraction for a count before opening again.
Where it fits in a workout
Flies are an isolation movement for after the pressing or rowing is done. Pair a chest fly with a rear delt fly for a balanced superset.
How many sets, how heavy and how hard: see what the ACSM position stands support.
Variations and alternatives
Similar exercises
Without dumbbell
When to talk to someone
- Chest discomfort, feeling faint or lightheaded, or trouble breathing during or after exercise can be signs of a heart attack. In the US, call 911 right away; elsewhere, call your local emergency number.
- Heart, metabolic or kidney disease, or symptoms like these when you are active: talk to your doctor before you start or step up training.
- Pregnant: ask your obstetric care provider which exercise suits you.
Track the Stability Ball Single Leg Dumbbell Fly in SetGrip
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Sources
- ACSM position stand on exercise quantity and quality (Garber et al., 2011)
- ACSM preparticipation health screening (Riebe et al., 2015)
- ACOG Committee Opinion No. 804 on exercise in pregnancy (2020)
- CDC: About Heart Attack Symptoms, Risk, and Recovery (2024)
Sources checked on October 17, 2026. Full citations are in the exercise library.
Animation and exercise data: ExerciseDB, licensed to SetGrip. General information, not medical or coaching advice.