GymWorkout.in
shouldersbeginnerReviewed by Rohan Varma, CSCS

Reverse Pec Deck Machine

Locked-in rear deltoid isolation that eliminates body sway and cheating.

Recommended Sets3–4 Sets
Rep Range12–15 Reps
Rest Period60s Rest
Equipmentmachine

3D Visual Form & Technique Demonstration

Biomechanically verified form execution and joint angle cues.

Official Video Tutorial · 3D Biomechanics & Form DemonstrationWatch on YouTube
How to Execute the Reverse Pec Deck Machine

Adjust seat so handles are at eye level, chest flat against pad. Grasp handles with neutral grip, elbows softly bent.

  • Primary Muscle: SHOULDERS
  • Secondary Synergists: BACK
  • Rest Interval: 60 seconds between sets

Reverse Pec Deck Machine Anatomy Activation

Primary motor unit recruitment for shoulders with secondary synergist stabilizers.

Primary (shoulders)
Secondary Synergists
Anterior (Front View)
Anterior Muscle Recruitment: shouldersFront anatomical silhouette highlighting shoulders in orange as active agonist.
Secondary / Stabilizer View
Posterior (Back View)
Posterior Muscle Recruitment: shouldersBack anatomical silhouette highlighting shoulders in orange as active agonist.
Secondary / Stabilizer View
Anatomical PlaneScapular & Frontal Planes
Primary KinesiologyHumeral Abduction & Flexion
Biomechanical VectorSuperior-lateral vector across deltoid tuberosity
Active Anatomy:Primary: shouldersSynergist: back
Figure: Biomechanical muscle recruitment model for shoulders. Highlighted in orange is the primary agonist motor unit; highlighted in blue are synergistic stabilizing groups (back).

Step-by-Step Execution Guide

1

Adjust seat so handles are at eye level, chest flat against pad.

2

Grasp handles with neutral grip, elbows softly bent.

3

Pull handles out and back until aligned with shoulders.

4

Hold contraction, return smoothly.

Common Mistakes & Form Fixes

Letting weight stack clatter between reps.

Arching back off pad.

Biomechanical Safety & Injury Warning

Keep elbows high and wrists straight.

Alternative Exercises & Swaps

If the equipment is occupied or you need a joint-friendly variation, substitute with these approved movements:

Bent-Over Dumbbell Rear Delt Flyshoulders
View Form
Rope Cable Face Pullback
View Form
Rohan Varma, CSCS
Authored By
Rohan Varma, CSCSHead Strength Coach & Biomechanics Lead
Rohan Varma, CSCS
Medically Reviewed By
Rohan Varma, CSCSHead Strength Coach & Biomechanics Lead
Last Reviewed & Verified: 2026-03-29
Read our Medical Fact-Checking Standards
← Back to Exercise LibraryExplore Complete SHOULDERS Workout