Research
Cellular
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).
ABT may not be as effective as PBT for increasing VL50 muscle thickness.
StrongSupportsmedium confidence
but not in ABT (26.72±3.75 to 28.45±3.42 mm; p=0.16; +6.47%).
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
- 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).Strong
- Both PBT and ABT strategies produced similar lower body hypertrophy outcomes with no significant group differences.Strong
Related findings · Cellular
- Athletes aiming to reduce fat mass and preserve FFM should consume protein intakes in the range of ∼1.8-2.7 g kg(-1) d(-1).Strong
- A minimum daily protein intake of ≥1.6 g/kg is necessary to observe significant improvements in muscle mass from whey protein supplementation.Strong
- Most athletes ideally need 1.2 to 2.0 grams/kg of body weight/day of protein, preferably split across 3-4 meals.Strong
This is one finding among thousands. Every one is graded and traced to its source, so you can see what the evidence actually supports. Browse the research →