Machine Chest Fly vs Cable Low Fly Crossovers
Swapping Machine Chest Fly (Machine) for Cable Low Fly Crossovers (Cable) retains 100% overlap; expect pulley-guided continuous line of pull. 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 Machine Chest Fly for Cable Low Fly Crossovers.
| Muscle Group | Machine Chest Fly | Cable Low Fly Crossovers | Leverage Shift |
|---|---|---|---|
| Chest (Pectoralis Major) | Primary (85%) | Primary (85%) | Matched |
| Shoulders (Deltoids) | Secondary (15%) | Secondary (15%) | Matched |
Load & Volume Conversion: Machine Chest Fly → Cable Low Fly Crossovers
Worked weight heuristic: a 115 kg set on Machine Chest Fly (Machine) maps roughly to 45 kg on Cable Low Fly Crossovers (Cable; 2.5 kg jumps, curve: constant cable tension at peak lengthened position). Calibrate set 1 at RPE 8 so e1RM history for Machine Chest Fly remains unskewed. Zero anatomical muscles are dropped between Machine Chest Fly and Cable Low Fly Crossovers; 1:1 weekly set volume carries straight across.
Supporting Sports-Science Literature
| Study Title | Lead Author & Year | Verified Link |
|---|---|---|
| Specific prime movers' excitation during free-weight bench press variations and chest press machine in competitive bodybuilders. | Coratella (2020) | PubMed 31397215 ↗ |
| A comparison of muscle activity and 1-RM strength of three chest-press exercises with different stability requirements. | Saeterbakken (2011) | PubMed 21225489 ↗ |
| Muscle activity levels in upper-body push exercises with different loads and stability conditions. | Calatayud (2014) | PubMed 25419894 ↗ |
| Dumbbell versus cable lateral raises for lateral deltoid hypertrophy: an experimental study. | Larsen (2025) | PubMed 40692697 ↗ |