If older guys work out in the evening and then eat protein before bed, their muscles use that protein better overnight to repair and grow.
Evidence from Studies
Supporting (2)
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Physical Activity Performed in the Evening Increases the Overnight Muscle Protein Synthetic Response to Presleep Protein Ingestion in Older Men.
The study shows that when older men exercise in the evening and eat protein before bed, their muscles build more protein overnight than if they just ate protein without exercising.
Physical Activity Performed in the Evening Increases the Overnight Muscle Protein Synthetic Response to Presleep Protein Ingestion in Older Men.
The study found that when older men exercised in the evening and ate protein before bed, their muscles built more protein overnight compared to just eating protein alone.
Contradicting (2)
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Exercise Plus Presleep Protein Ingestion Increases Overnight Muscle Connective Tissue Protein Synthesis Rates in Healthy Older Men.
The study looked at how exercise and protein before bed affect connective tissue in muscles, not the main muscle fibers. So it doesn’t fully answer the question in the claim.
Presleep dietary protein-derived amino acids are incorporated in myofibrillar protein during postexercise overnight recovery.
The study looked at young men, not older men, and found that protein before bed didn’t speed up muscle repair after evening exercise, even though some protein was used by muscles.
Gold Standard Evidence Needed
According to GRADE and EBM methodology, here is what ideal scientific evidence would look like to definitively prove or disprove this specific claim, ordered from strongest to weakest evidence.