Research
Cellular
Percentage-based training (PBT) resulted in a significant increase in muscle thickness of the vastus lateralis at 50% femur length (VL50) from 25.4±3.28 mm to 28.1±4.64 mm (+10.42%; p=0.04).
Practitioners can expect significant hypertrophy in VL50 with percentage-based training.
StrongSupportsmedium confidence
There was a significant time effect for VL50 (25.4±3.28 to 28.1±4.64mm; p=0.04; +10.42%) in PBT.
Why this rating
Based on the study design involving a controlled comparison of training methods.
Source
Percentage-based and Autoregulated-based Resistance Training Loading Produce Similar Lower Body Hypertrophy Outcomes
Ryan K. Byrnes et al. · Medicine & Science in Sports & Exercise · 2017
DOI 10.1249/01.mss.0000517184.53506.f4
rct · n=11
Read the paper DOI resolved against Crossref · corpus check 2026-06-10
More from this paper
- Autoregulated-based training (ABT) did not show a significant increase in muscle thickness of the vastus lateralis at 50% femur length (VL50) from 26.72±3.75 mm to 28.45±3.42 mm (+6.47%; p=0.16).Strong
- Both PBT and ABT strategies produced similar lower body hypertrophy outcomes with no significant group differences.Strong
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