The Study
Low-Load High Volume Resistance Exercise Stimulates Muscle Protein Synthesis More Than High-Load Low Volume Resistance Exercise in Young Men
This study watched how muscles in young men reacted right after different kinds of weightlifting. It found that lifting light weights many times made muscles react more strongly than lifting heavy weights a few times—but only for a few hours. It doesn't prove that one way builds more muscle over time, just what happens right after.
Analysis score
Maximum 90 for a randomized controlled trial.
Where the score came from
Scientists had men lift weights in three ways: heavy weights a few times, light weights the same total work, or light weights until exhaustion. They measured muscle growth signals after exercise.
Where does this study sit?
Reviews of RCTs (Meta-analyses)
Max 100Randomized Trials
Max 90Reviews of Cohort Studies
Max 85Cohort Studies
Max 72Reviews of Case-Control Studies
Max 63Case-Control Studies
Max 58Cross-Sectional & Case Series
Max 50Expert Opinion
Max 562 / 100
Quality score
Participants are randomly assigned to treatment or control groups, minimizing bias. The gold standard for testing whether an intervention causes an effect.
Key takeaways
Summary
Based on the study abstract and findings.
- 1This means doing many reps with light weights until you're exhausted may keep your muscles building for longer than doing fewer heavy reps — even if the total work is the same.
- 2Lifting light weights until failure increased muscle protein synthesis by 199% at 24 hours, while heavy lifting didn't.
- 3It also boosted key growth signals (4E-BP1) by 312% and myogenin gene expression by 204% — more than the other methods.
Score breakdown, methodology, conflicts of interest, evidence analysis & raw study data
Publication
Journal
PLoS ONE
Year
2010
Authors
N. Burd, Daniel W D West, Aaron W. Staples, P. Atherton, J. Baker, D. Moore, A. Holwerda, G. Parise, M. Rennie, S. Baker, Stuart M Phillips
Related Content
Claims (6)
In young men, performing resistance exercises with light weights and many repetitions maintains muscle protein synthesis 24 hours after exercise at 199% above resting levels, while exercises with heavy weights and few repetitions do not maintain this elevation.
In young men, performing resistance exercises with light weights until muscle failure increases myogenin mRNA levels by 204% 24 hours after exercise more than doing the same amount of work without reaching failure.
In young men, performing resistance exercises with light weights and many repetitions increases sarcoplasmic protein synthesis for up to 24 hours after exercise, while exercises with heavy weights and few repetitions increase it only for 4 hours after exercise.
In young men, performing resistance exercises until muscle failure, regardless of weight used, leads to an increase in Pax7 mRNA levels 24 hours after exercise, and this increase does not correspond directly to changes in muscle protein synthesis rates measured shortly after exercise.
In young men, performing resistance exercises with lighter weights and more repetitions leads to higher levels of 4E-BP1 phosphorylation 24 hours after exercise compared to heavier weights with fewer repetitions, and this phosphorylation is associated with continued muscle protein synthesis.
When resistance training is performed to complete muscular fatigue, sets with more than 35 repetitions result in the same amount of muscle growth as sets with moderate repetitions.
Not medical advice. For informational purposes only. Always consult a qualified healthcare professional before making health decisions.