The Claim
In resistance-trained individuals, when cluster sets and traditional sets are matched for total repetitions, sets, and effort level (0–1 RIR), the increases in rectus femoris muscle thickness and thigh lean tissue mass over an 8-week training period are similar, with effect sizes of 0.56 versus 0.42 for muscle thickness and 0.11 versus 0.13 for lean tissue mass.
What the research says
Supports is higher
Support is ahead, but a single strong opposing study can change this.
These are independent scores, not a percentage. Higher-grade studies count more, so a single strong opposing study can outweigh several weaker ones.
In people who regularly lift weights, using cluster sets or traditional sets with the same total workload and effort produces the same amount of increase in muscle thickness and lean tissue mass in the thigh after 8 weeks of training.
See the scientific wording
In resistance-trained individuals, cluster sets and traditional sets, when matched for total repetitions, sets, and effort level (0–1 RIR), produce similar increases in rectus femoris muscle thickness (effect size: 0.56 vs. 0.42) and thigh lean tissue mass (effect size: 0.11 vs. 0.13) over an 8-week training period, suggesting that set configuration does not differentially influence hypertrophic outcomes under these conditions.
When muscles are worked to near failure with the same total number of reps and same level of effort, the force pulling on muscle fibers and the buildup of metabolic byproducts trigger the same amount of new muscle protein building, regardless of whether the reps are done in short bursts or long continuous sets.
What the research says
1 studyWhen people who already lift weights do either short breaks between reps or long continuous sets, but do the same total number of reps and push just as hard, their muscles grow about the same either way.
Score breakdown, mechanism chain, raw evidence, ideal studies needed & 1 supporting studies
Not medical advice. For informational purposes only. Always consult a qualified healthcare professional before making health decisions.