The Study
Protein Ingestion before Sleep Increases Muscle Mass and Strength Gains during Prolonged Resistance-Type Exercise Training in Healthy Young Men.
This study is like a fair test where people were randomly split into two groups — one got protein before bed, the other didn’t. It shows that the protein group gained more muscle and strength, so it’s good evidence that the protein helped.
Analysis score
Maximum 90 for a randomized controlled trial.
Where the score came from
Young men who ate protein before bed while doing weight training got stronger and built more muscle than those who didn’t.
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 561 / 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.
- 1Yes, the differences are meaningful for building noticeable muscle and strength.
- 2The protein group gained more strength (+164 kg vs +130 kg), bigger leg muscles (+8.4 cm² vs +4.8 cm²), and larger muscle fibers (+2319 μm² vs +1017 μm²).
Score breakdown, methodology, conflicts of interest, evidence analysis & raw study data
Publication
Journal
The Journal of nutrition
Year
2015
Authors
T. Snijders, Peter T. Res, J. Smeets, S. van Vliet, J. V. van Kranenburg, K. Maase, A. Kies, L. Verdijk, L. V. van Loon
Related Content
Claims (4)
If young, healthy guys lift weights for 12 weeks and drink a protein shake before bed, they get way stronger than those who don’t — like 30 more pounds on their lifts.
If young, healthy guys eat protein before bed while lifting weights for 12 weeks, their muscle fibers grow way more than if they don’t — like almost double the growth, according to one study.
If young, healthy guys drink a protein shake with some carbs before bed while lifting weights for 12 weeks, they’ll probably gain more muscle and get stronger than if they just drank a fake shake with no calories.
If young guys eat protein before bed while lifting weights for 12 weeks, they gain more leg muscle than those who don’t — about twice as much, according to one study.
Not medical advice. For informational purposes only. Always consult a qualified healthcare professional before making health decisions.