Whether young men took collagen supplements or a placebo during 15 weeks of leg training did not meaningfully change how strongly muscle growth was linked to strength gains.
Evidence from Studies
No evidence studies found yet.
What Would Prove This
Per GRADE and EBM methodology, here is what ideal scientific evidence would look like to definitively prove or disprove this claim, ordered from strongest to weakest.
Whether collagen or other protein supplements consistently alter the strength of the association between muscle growth and strength gains across resistance training studies.
A systematic review and meta-analysis of all RCTs comparing muscle-strength associations in participants receiving protein/collagen supplements versus placebo during resistance training, using within-participant correlation as the primary outcome.
Whether collagen supplementation alters the slope of the relationship between muscle growth and strength gains compared to placebo.
A double-blind RCT with 150+ healthy young men randomized to collagen peptide (15g/day) or placebo during 16 weeks of resistance training, measuring muscle volume (MRI) and strength (iMVT, 1RM) pre/post, and testing whether the within-participant correlation slope differs between groups.
Whether habitual protein intake modulates the strength of the muscle-strength association in resistance-trained individuals.
A prospective cohort study tracking 200+ resistance-trained men for 24 weeks, measuring daily protein intake, muscle volume (MRI), and strength (iMVT, 1RM), and testing whether protein intake modifies the within-participant correlation between muscle growth and strength gains.
Whether individuals with higher protein intake exhibit stronger muscle-strength associations at a single time point.
A cross-sectional study comparing within-person muscle volume–strength correlation strength in 300+ resistance-trained men stratified by habitual protein intake (low, medium, high), using MRI and duplicate strength assessments.
Whether extreme protein intake (e.g., >4g/kg/day) alters the muscle-strength relationship in a single individual.
A case series documenting muscle volume and strength changes over 16 weeks in 5 individuals consuming very high protein diets (>3.5g/kg/day) during resistance training, comparing their within-person correlation to population norms.