Suspension Single Arm Rear Delt Row
- Target muscle
- Deltoid Posterior
- Synergist muscles
- Brachialis, Brachioradialis, Deltoid Lateral, Infraspinatus, Teres Minor, Trapezius Lower Fibers, Trapezius Middle Fibers
- Equipment
- Suspension
- Body part
- Shoulders
- Type
- Strength
The suspension single arm rear delt row is a unilateral pulling exercise performed on suspension straps that isolates the posterior deltoid while recruiting the brachialis, brachioradialis, lateral deltoid, infraspinatus, teres minor, and middle and lower trapezius as synergists. By holding one handle with one hand and rowing the elbow back and out, the single-arm setup also demands significant anti-rotation core stability. It is an effective tool for correcting shoulder imbalances and building rear-delt strength with minimal equipment.
How to do the Suspension Single Arm Rear Delt Row
- 1Set the suspension strap to a length where the handle hangs at roughly hip to waist height when you are standing in front of the anchor point.
- 2Stand facing the anchor, reach out with one hand, and grip the handle with your palm facing inward (neutral grip).
- 3Walk your feet toward the anchor point until your body is at an angle — the steeper the lean, the harder the exercise.
- 4Extend your working arm fully, let your body hang back at the chosen angle, and brace your core to keep your hips level and your body in a straight line from head to heels.
- 5Initiate the pull by driving your elbow back and out to the side at roughly shoulder height, as if trying to point your elbow behind and away from you.
- 6Continue pulling until your hand reaches the side of your chest and your elbow is behind your torso, keeping the movement controlled and your shoulder blade pulled back and down.
- 7Pause briefly at the top with your rear delt fully contracted.
- 8Slowly return your arm to the fully extended starting position under control, resisting the pull of the strap.
- 9Complete all reps on one side before switching to the other arm.
Form tips
- Lead with the elbow flaring out to the side rather than pulling straight back — this positions the movement in the horizontal abduction pattern that maximally targets the posterior deltoid.
- Keep your free hand at your side or on your hip; avoid reaching across your body, which introduces unwanted rotation.
- Actively resist twisting — your torso should stay square to the anchor throughout every rep, which is what makes the single-arm version more demanding than the bilateral version.
- Control the eccentric (lowering) phase over 2–3 seconds to increase time under tension and rear-delt recruitment.
- Adjust the angle of your body to manage difficulty: walk feet closer to the anchor to increase the load, walk feet further away to reduce it.
Common mistakes
- Pulling the elbow straight back toward the hip rather than out to the side, which shifts the load onto the mid-back and reduces posterior deltoid isolation.
- Letting the body rotate toward the working arm as fatigue sets in, which offloads the rear delt and reduces the anti-rotation core demand that makes this exercise valuable.
- Using momentum or a body swing to complete the rep, which shortens the effective range of motion and removes tension from the posterior deltoid at the most important point of the movement.
- Shrugging the shoulder up toward the ear at the top position, which recruits the upper trapezius instead of keeping the emphasis on the posterior deltoid and middle and lower trapezius.
- Setting the strap angle too shallow (body nearly upright), which reduces resistance so much that the rear delt receives insufficient stimulus — lean back enough to feel genuine challenge.
Frequently asked questions
What muscles does the suspension single arm rear delt row work?
The primary muscle is the posterior deltoid. The brachialis, brachioradialis, lateral deltoid, infraspinatus, teres minor, and the middle and lower trapezius all assist the movement. The single-arm setup also places a significant anti-rotation demand on the core throughout every rep.
How is the suspension single arm rear delt row different from the two-arm version?
Performing the movement with one arm at a time means the body has a constant tendency to rotate toward the working side, so your core must resist that rotation actively on every rep. This unilateral demand trains core stability alongside rear-delt strength, and it also lets you identify and address any strength imbalance between your left and right shoulders.
How do I make the suspension single arm rear delt row harder or easier?
Adjust the angle of your body relative to the floor. Walking your feet closer to the anchor point increases the lean, shifting more of your bodyweight onto the strap and making the exercise harder. Walking further from the anchor reduces the lean and the resistance. No strap adjustment is needed — simply reposition your feet.
How many sets and reps should I do for the suspension single arm rear delt row?
For rear-delt hypertrophy and shoulder health, 3–4 sets of 10–15 reps per arm works well. Use an angle that makes the last 2–3 reps of each set genuinely challenging while still allowing full control. Count each arm separately and rest 30–60 seconds between arms to keep training density high.
Can I use the suspension single arm rear delt row to fix rounded shoulders or shoulder imbalances?
Yes. Strengthening the posterior deltoid, infraspinatus, teres minor, and middle and lower trapezius directly counteracts the forward-pull of overdeveloped anterior muscles, which is a common cause of rounded shoulders. The unilateral setup is particularly useful for addressing side-to-side strength imbalances by training each arm independently.
