Machine Lateral Raise vs Dumbbell Upright Row
Swapping Machine Lateral Raise (Machine) for Dumbbell Upright Row (Dumbbell) retains 65% overlap; expect independent unilateral stabilization. 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 Lateral Raise for Dumbbell Upright Row.
| Muscle Group | Machine Lateral Raise | Dumbbell Upright Row | Leverage Shift |
|---|---|---|---|
| Shoulders (Deltoids) | Primary (85%) | Primary (50%) | -35% vs Machine Lateral Raise |
| Traps (Upper & Mid Trapezius) | Secondary (15%) | Primary (30%) | +15% on Dumbbell Upright Row |
| Biceps Brachii & Brachialis | — None | Secondary (20%) | +20% on Dumbbell Upright Row |
Load & Volume Conversion: Machine Lateral Raise → Dumbbell Upright Row
Worked weight heuristic: a 115 kg set on Machine Lateral Raise (Machine) maps roughly to 38 kg per hand on Dumbbell Upright Row (Dumbbell; 2 kg jumps, curve: extended end-range stretch with neutral wrist path). Calibrate set 1 at RPE 8 so e1RM history for Machine Lateral Raise remains unskewed. Dumbbell Upright Row recruits additional Biceps Brachii & Brachialis stimulus compared to Machine Lateral Raise, increasing total regional demand per set.
Supporting Sports-Science Literature
| Study Title | Lead Author & Year | Verified Link |
|---|---|---|
| Greater Gastrocnemius Muscle Hypertrophy After Partial Range of Motion Training Performed at Long Muscle Lengths. | Kassiano (2023) | PubMed 37015016 ↗ |
| Different Foot Positioning During Calf Training to Induce Portion-Specific Gastrocnemius Muscle Hypertrophy. | Nunes (2020) | PubMed 32735428 ↗ |
| Effect of grip width on electromyographic activity during the upright row. | McAllister (2013) | PubMed 22362088 ↗ |
| Effects of body position and loading modality on muscle activity and strength in shoulder presses. | Saeterbakken (2013) | PubMed 23096062 ↗ |