Mixed
Cluster sets (CS) elicit similar muscular hypertrophy to traditional sets (TS) when volume (sets/reps) and effort (RIR 0-1) are equated.
If you prefer cluster sets (pausing between reps/blocks), you can build muscle just as effectively as traditional sets, provided you match the total number of reps and train close to failure (0-1 reps in reserve). Don't worry about the total weight moved being lower in CS; focus on hitting your rep targets with high effort.
Results showed similar increases in muscle thickness... and lean tissue mass... in both CS and TS conditions... when sets, repetitions, and load adjustments were equalized based on RIR, a CS protocol elicits similar increases in muscle thickness and lean mass compared to a TS protocol.
Why this rating
Small sample size (n=10), short duration (8 weeks), and unilateral design limit generalizability, though the within-subject design reduces variability.
Source
Cluster sets and traditional sets elicit similar muscular hypertrophy: a volume and effort-matched study in resistance-trained individuals
Salvador Vargas-Molina et al. · European Journal of Applied Physiology · 2025
DOI 10.1007/s00421-025-05712-6
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