Research
Cellular
Changes in muscle thickness (MT) of the pectoralis major (PM) were observed in the 4-6 RPE group (+2.03 mm), 7-9 RPE group (+0.71 mm), and 7-9+ RPE group (+2.73 mm).
Resistance training programs can lead to varying degrees of muscle hypertrophy depending on proximity to failure.
StrongSupportsmedium confidence
Changes in MT of the PM were observed in both groups (4-6 RPE: +2.03 mm; 7-9 RPE: +0.71 mm; 7-9+ RPE: +2.73).
Why this rating
Based on study design from abstract.
Source
Effect Of Proximity To Failure During Resistance Training On Upper Body Hypertrophy
Ethan Elkins et al. · Medicine & Science in Sports & Exercise · 2023
DOI 10.1249/01.mss.0000984780.95779.86
other · n=29
Read the paper DOI resolved against Crossref · corpus check 2026-06-10
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