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.
Sets, reps and where it fits
| Goal | Sets × reps | Rest |
|---|---|---|
| Muscle growth | 3–4 × 10–15 per side | 60–90 s |
| Endurance / finisher | 2–3 × 15–20 per side | 45 s |
| Strength | Not ideal — pick a compound lift for the same muscle | — |
Flies are an isolation movement for after the pressing or rowing is done. Pair a cable crossover with a cable rear delt fly on the same station, or dumbbell chest flies with dumbbell rear delt flies on the same bench.
Variations and alternatives
Similar exercises
Without cable
Frequently asked questions
What muscles does the Decline Single Arm Cable Fly work?
The Decline Single Arm Cable Fly primarily works the pectorals. It also involves the delts and triceps, which assist the movement and stabilise the joints.
Is the Decline Single Arm Cable Fly good for beginners?
It is rated intermediate, so it suits people who already train regularly. Beginners can still do the Decline Single Arm Cable Fly with light load and a spotter or coach watching the first few sessions; if it feels awkward, pick an easier variation from the alternatives below first.
What can I do instead of the Decline Single Arm Cable Fly?
If you cannot do the Decline Single Arm Cable Fly, try the Isometric Chest Squeeze, the Decline Twisting Grip Dumbbell Fly or the Stability Ball Single Arm Dumbbell Fly. Each of them trains the pectorals through a similar movement, so you can swap them in without changing the rest of the workout.
How many sets and reps should I do?
It depends on your goal. For the Decline Single Arm Cable Fly, a sensible starting point is muscle growth: 3–4 × 10–15 per side with 60–90 s rest; endurance / finisher: 2–3 × 15–20 per side with 45 s rest. Do it after your compound lifts. It is a finishing movement, not the main event.
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