Decline Single Arm Cable Fly
In SetGrip: Cable Fly (Decline, Single Arm)
Running one arm at a time on the decline bench turns each set into a side-by-side comparison: a weaker pec cannot hide behind a stronger one. The single low cable also pulls you sideways off the bench, so your trunk resists rotation on every rep, and the constant tension holds the lower chest under load even at the top.
How to do the Decline Single Arm Cable Fly
- Attach a D-handle to a low pulley cable machine and set the bench to a decline angle.
- Lie down on the bench with your head towards the machine and grab the handle with your right hand.
- Extend your arm straight up above your chest, keeping a slight bend in your elbow.
- With a controlled motion, lower your arm out to the side until your hand is in line with your shoulder.
- Pause for a moment, then reverse the motion and bring your arm back to the starting position.
- Repeat for the desired number of repetitions, then switch to your left arm and repeat the exercise.
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.