Dumbbell Rear Delt Row vs Cable Rear Delt reverse Fly
Swapping Dumbbell Rear Delt Row (Dumbbell) for Cable Rear Delt reverse Fly (Machine) retains 100% overlap; expect externally braced cam track. Compare exact 17-muscle fractional recruitment before swapping equipment mid-session.
Side-by-Side 17-Muscle Recruitment Delta
How primary mover (1.0× set) and synergist (0.5× set) allocation changes when swapping Dumbbell Rear Delt Row for Cable Rear Delt reverse Fly.
| Muscle Group | Dumbbell Rear Delt Row | Cable Rear Delt reverse Fly | Leverage Shift |
|---|---|---|---|
| Shoulders (Deltoids) | Primary (45%) | Primary (45%) | Matched |
| Upper Back (Rhomboids / Mid-Traps) | Primary (40%) | Primary (40%) | Matched |
| Traps (Upper & Mid Trapezius) | Secondary (15%) | Secondary (15%) | Matched |
Load & Volume Conversion: Dumbbell Rear Delt Row → Cable Rear Delt reverse Fly
Worked weight heuristic: a 38 kg per hand set on Dumbbell Rear Delt Row (Dumbbell) maps roughly to 55 kg on Cable Rear Delt reverse Fly (Machine; 5 kg jumps, curve: cam-matched resistance across sticking points). Calibrate set 1 at RPE 8 so e1RM history for Dumbbell Rear Delt Row remains unskewed. Zero anatomical muscles are dropped between Dumbbell Rear Delt Row and Cable Rear Delt reverse Fly; 1:1 weekly set volume carries straight across.
Supporting Sports-Science Literature
| Study Title | Lead Author & Year | Verified Link |
|---|---|---|
| Muscle activation patterns while lifting stable and unstable loads on stable and unstable surfaces. | Kohler (2010) | PubMed 20072068 ↗ |
| Quantifying 'normal' shoulder muscle activity during abduction. | Wickham (2010) | PubMed 19625195 ↗ |
| Effect of hand position on EMG activity of the posterior shoulder musculature during a horizontal abduction exercise. | Schoenfeld (2013) | PubMed 23302754 ↗ |
| Evaluation of muscle activity during a standardized shoulder resistance training bout in novice individuals. | Jakobsen (2012) | PubMed 22067242 ↗ |