The Study
Pre-sleep Protein Ingestion Increases Mitochondrial Protein Synthesis Rates During Overnight Recovery from Endurance Exercise: A Randomized Controlled Trial
This study is like a carefully controlled science experiment where people were randomly given different drinks before bed after exercise. It shows that drinking protein before sleep helps the body build more muscle and energy-producing parts in muscles overnight.
Analysis score
Maximum 90 for a randomized controlled trial.
Where the score came from
This study checks if eating protein before bedtime helps your muscles recover after exercise, especially inside the tiny energy factories in your muscles.
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 582 / 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, eating protein before sleep helps your body repair muscles and build energy systems after exercise, which could help you get stronger and fitter over time.
- 2Kids who ate 45 grams of protein (whey or casein) before bed had 30% higher muscle repair and 23% higher energy factory repair overnight compared to those who didn’t.
- 3Whey and casein worked the same.
Score breakdown, methodology, conflicts of interest, evidence analysis & raw study data
Publication
Journal
Sports Medicine (Auckland, N.z.)
Year
2023
Authors
J. Trommelen, Glenn A. A. van Lieshout, Pardeep Pabla, J. Nyakayiru, Floris K. Hendriks, J. Senden, J. Goessens, J. V. van Kranenburg, A. Gijsen, L. Verdijk, L. D. de Groot, L. V. van Loon
Related Content
Claims (4)
If young, healthy guys eat 45 grams of protein before bed after a long run, their muscles repair and rebuild better overnight — whether they choose whey or casein protein doesn’t matter.
Drinking 45g of either whey or casein protein before bed helps muscle recovery just as much after endurance exercise in young, healthy guys — neither one works better than the other.
If young, healthy guys eat 45 grams of protein before bed after a workout, their muscles build more energy-producing parts overnight compared to skipping the protein.
Whey protein gives you a quick spike in amino acids in your blood, while casein keeps levels up longer — but overall, they give your body about the same amount of fuel, and neither one boosts muscle or energy-cell growth more during sleep.
Not medical advice. For informational purposes only. Always consult a qualified healthcare professional before making health decisions.