Stability Ball Single Arm Cable Fly
In SetGrip: Cable Fly (Stability Ball, Single Arm)
Seated upright on a ball with one cable sweeping across your body, this fly loads the chest while the pulley's sideways drag tries to twist you off your base. It sits closer to a trunk-and-shoulder control drill than a mass builder, so keep the stack modest and stay tall through every rep.
How to do the Stability Ball Single Arm Cable Fly
- Sit on an exercise ball with your feet flat on the ground and your back straight.
- Hold a cable handle in one hand and extend your arm out to the side, parallel to the ground.
- Keep your elbow slightly bent and your palm facing forward.
- Slowly bring your arm across your body, squeezing your chest muscles.
- Pause for a moment at the end of the movement, then slowly return to the starting position.
- Repeat for the desired number of repetitions, then switch sides.
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 cable
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.
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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.