Bent Over Single-Arm Rear Delt Cable Fly

Bent Over Single-Arm Rear Delt Cable Fly focuses on the rear shoulders and upper-back stabilizers while the trunk or chest support keeps momentum out of the movement.

Primary muscle

Shoulders

Primary musclesPosterior deltoids, Rhomboids, Middle trapezius

Secondary musclesInfraspinatus, Teres minor, Lower trapezius

Equipment

Strength Machine

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Set up for Bent Over Single-Arm Rear Delt Cable Fly

Prepare the strength machine

Adjust the seat, back pad, and movement arm so the machine pivot aligns with the joint being trained.
Insert the weight pin fully and test the start/stop mechanism with a light load.

Position yourself for Bent Over Single-Arm Rear Delt Cable Fly

Establish the named start position for Bent Over Single-Arm Rear Delt Cable Fly, secure the strength machine, and rehearse the complete pain-free range before adding effort.
Set the chest or trunk support first, then confirm that the arms can move without the neck tensing or the shoulders rolling forward. Keep the non-working side stable and compare both sides before choosing the working range.

Choose and verify the starting level

Use a conservative load for the first set of Bent Over Single-Arm Rear Delt Cable Fly. You should be able to pause at the hardest position without changing the intended joint path.
Perform one slow rehearsal repetition and change the setup if the equipment shifts, the range causes pain, or the target position cannot be maintained.

How to perform Bent Over Single-Arm Rear Delt Cable Fly

Follow the sequence in order, paying attention to the starting position, movement path, and finish described in each step.

Set the chest, trunk, and arm position for Bent Over Single-Arm Rear Delt Cable Fly, then draw the shoulders away from the ears.
Maintain a small fixed bend in the elbows and keep the wrists straight before raising the arms.
Move the elbows or hands outward and back while maintaining the intended elbow angle.
Finish with the rear shoulders working and the shoulder blades controlled, not aggressively pinched.
Return the arms slowly without letting the load pull the shoulders forward.

Common Bent Over Single-Arm Rear Delt Cable Fly mistakes

These are the form changes most likely to move work away from the target muscles or make the repetition harder to control.

Shrugging to lift

Keep the neck relaxed and move from the rear shoulder rather than elevating the shoulder blades.

Changing the elbow angle

Maintain the intended bend so the movement remains a fly, face pull, or Y raise instead of becoming a row.

Using trunk momentum

Keep the chest support or hip hinge still and reduce the load if the torso moves.

Over-squeezing the shoulder blades

Finish when the rear deltoids are shortened without forcing the shoulders into an aggressive pinch.

When to modify or choose another exercise

Reduce the resistance, range, lever length, or balance demand if Bent Over Single-Arm Rear Delt Cable Fly cannot be completed without compensation.
Stop when the exercise produces sharp, catching, radiating, or increasing joint pain rather than the expected muscular effort.
Use a neutral grip, shorter range, or supported variation when the shoulder feels pinched; avoid working through pain or a recent restriction from a clinician.
Compare sides with the same starting load and range; a persistent or painful asymmetry should be assessed rather than trained around blindly.

Programming guide

How to use Bent Over Single-Arm Rear Delt Cable Fly in a training program

Use Bent Over Single-Arm Rear Delt Cable Fly as accessory work after larger compound exercises, or earlier only when its target action is the session's priority.

Where it fits in a session

Use Bent Over Single-Arm Rear Delt Cable Fly after larger compound movements, or earlier only when its target action is the workout's main priority.

How often to use it

Use one to three times per week and count the work alongside compound exercises that train the same muscles.

Starting rep ranges by goal

Goal	Sets	Reps or time	Rest	Effort and execution
Strength accessory	2–4	6–10 per side	75–150 sec	Leave 2–3 controlled reps in reserve
Muscle growth	2–4	10–20 per side	60–120 sec	Usually 1–3 clean reps in reserve
Local endurance	2–3	15–25 per side	45–90 sec	Stop before range or joint position changes

How to progress it

Add controlled repetitions within the selected range before increasing resistance. For unilateral work, progress each side according to the weaker technically sound performance.

Pairing and sequencing

Superset with a non-competing accessory when both exercises can keep their intended joint paths.
Do not add isolation volume without counting the work already received from compound lifts.

Coach's notes

Program 2–4 sets of 8–15 controlled repetitions per side; 12–20 repetitions can also suit lighter isolation and rotator-cuff work.
Rest 45–90 seconds, extending the interval if fatigue changes joint position or the intended muscle action.
Add repetitions before load and count these sets toward the weekly volume already supplied by compound exercises.

Scale the movement