SOURCE-LINKED STUDY SUMMARY
Protein Ingestion before Sleep Increases Muscle Mass and Strength Gains during Prolonged Resistance-Type Exercise Training in Healthy Young Men.
Abstract summarizedQuality not appraised
- What was studied
- This randomized trial tested whether a nightly pre-sleep protein supplement augmented muscle and strength gains during progressive resistance training.
- Who / model studied
- Forty-four healthy young men, mean age 22 years, completed a 12-week progressive resistance-training program.
- Studied dose & schedule
- Each night before sleep, participants received either 27.5 g protein, 15 g carbohydrate and 0.1 g fat or a noncaloric placebo.
- What the study found
- Quadriceps cross-sectional area increased 8.4 cm² with protein versus 4.8 cm² with placebo. Strength and type II fiber-size gains were also greater with protein.
- Limitations & context
- Because the comparator was noncaloric, this trial did not isolate pre-sleep timing from extra daily protein and calories. The abstract reports no adverse-event results.
Read summary source ↗ · Prepared 10/6/2026 · AI-assisted, source-based summary
Review record & corrections
Summary prepared: . Source scope: abstract. This is an AI-assisted source summary, not an independent clinician sign-off.
No public field-by-field revision history is available for this card yet. The date above is the summary date, not proof that every field was updated then.
Inspect the source · Correction policyResearch findings apply to the population and conditions studied. This educational summary is not a treatment recommendation or a formal assessment of study quality.
Original publication ↗ · DOI: 10.3945/jn.114.208371