Cable Seated Rear Delt Fly with Chest Support exercise animation (Male)

Cable Seated Rear Delt Fly with Chest Support

Target muscle
Deltoid Posterior
Synergist muscles
Deltoid Lateral, Infraspinatus, Teres Minor, Trapezius Lower Fibers, Trapezius Middle Fibers
Equipment
Cable
Body part
Shoulders
Type
Strength

The cable seated rear delt fly with chest support is a shoulder isolation exercise that primarily targets the rear deltoids (posterior deltoid), with help from the lateral deltoids, infraspinatus, teres minor, and the lower and middle trapezius. Bracing your chest against the bench removes momentum and constant cable tension keeps the rear delts loaded through the full range, making it ideal for building upper-back detail and balanced shoulders.

How to do the Cable Seated Rear Delt Fly with Chest Support

  1. 1Set two cable pulleys to roughly chest height and attach a single handle to each, then position an incline bench facing the stack between them.
  2. 2Sit on the bench with your chest and torso supported against the backrest and grab the opposite-side handle in each hand so the cables cross in front of you.
  3. 3Set a slight bend in your elbows, draw your shoulder blades back, and start with your arms extended forward and the cables under tension.
  4. 4Pull both handles out and back in a wide arc, leading with your elbows and squeezing your shoulder blades together.
  5. 5Stop when your arms are roughly in line with your torso, pausing briefly to feel the contraction in your rear delts.
  6. 6Lower the handles under control back to the start, resisting the pull of the cables and keeping tension on the muscle.
  7. 7Complete your reps, then return the handles to the stack with control.

Form tips

  • Lead the movement with your elbows rather than your hands so the work stays on the rear delts instead of shifting to the biceps.
  • Keep your elbows soft and locked at a fixed angle throughout, treating the move as a fly, not a row.
  • Keep your chest pinned to the backrest so the support eliminates body english and isolates the shoulders.
  • Use a slow, controlled tempo and a light-to-moderate load; the rear delts respond better to clean reps than heavy weight.

Common mistakes

  • Using too much weight and swinging the torso, which turns the fly into a momentum-driven movement and takes tension off the rear delts.
  • Bending and straightening the elbows like a press, which recruits the triceps and reduces the stretch and contraction on the rear delts.
  • Shrugging the shoulders up toward the ears, which shifts the load to the upper traps instead of the targeted rear delts and lower-mid traps.
  • Cutting the range short and not returning the handles fully forward, which loses the stretch and the constant cable tension that makes this version effective.

Frequently asked questions

What muscles does the cable seated rear delt fly with chest support work?

It primarily works the rear deltoids (posterior deltoid), with the lateral deltoids, infraspinatus, teres minor, and the lower and middle trapezius assisting as synergists.

Why use chest support for the rear delt fly?

Bracing your chest against the bench locks your torso in place so you can't swing or use momentum. That forces the rear delts to do the work and keeps the movement strict.

How many sets and reps should I do?

Because the rear delts are a small muscle, this is a higher-rep accessory move. Aim for 3 to 4 sets of 12 to 20 reps with a controlled tempo and a light-to-moderate load.

Is the cable version better than dumbbells for rear delt flys?

Cables keep constant tension across the whole range, including the start where dumbbells go nearly weightless. With chest support added, the cable version is one of the strictest ways to isolate the rear delts.

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