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No significant differences were observed in relative volume between the 4-6 RPE and 7-9 RPE groups.
Practitioners can expect similar training volumes to yield comparable results in muscle adaptations.
StrongRefutesmedium confidence
No significant differences were observed between the 4-6 RPE and 7-9 RPE groups for relative volume (377.0 ± 18.24 vs. 393.5 ± 15.34 kg; p = 0.093).
Why this rating
Based on study design from abstract.
Source
Effect Of Proximity To Failure During Resistance Training On Pectoralis Major Muscle Thickness
Seth R. Hinson et al. · Medicine & Science in Sports & Exercise · 2022
DOI 10.1249/01.mss.0000876256.44233.8d
rct · n=14
Read the paper DOI resolved against Crossref · corpus check 2026-06-10
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