The Claim

A single session of eccentric knee-extension exercise transiently reduces maximal isometric and dynamic knee extension strength by approximately 10% and doubles serum creatine kinase levels in fit young males, indicating acute muscle damage, but these effects recover fully within 3 weeks of training.

Source: Partly Substituting Whey for Collagen Peptide Supplementation Improves Neither Indices of Muscle Damage Nor Recovery of Functional Capacity During Eccentric Exercise Training in Fit Males.

What the research says

Supports is higher

Support is ahead, but a single strong opposing study can change this.

Supports
53score
Challenges
0score

These are independent scores, not a percentage. Higher-grade studies count more, so a single strong opposing study can outweigh several weaker ones.

How it works
1 study reviewed
In plain English

One session of eccentric knee-extension exercise temporarily reduces knee strength by about 10% and increases a blood marker of muscle damage by 100% in healthy young men, but these changes return to normal after three weeks of continued training.

See the scientific wording

A single session of eccentric knee-extension exercise transiently reduces maximal isometric and dynamic knee extension strength by approximately 10% and doubles serum creatine kinase levels in fit young males, indicating acute muscle damage, but these effects recover fully within 3 weeks of training.

What the research says

1 study
  1. Study: Partly Substituting Whey for Collagen Peptide Supplementation Improves Neither Indices of Muscle Damage Nor Recovery of Functional Capacity During Eccentric Exercise Training in Fit Males.

    After one tough knee exercise, young men temporarily lost about 10% of their leg strength and had a spike in a muscle damage marker, but after three weeks of training, they got even stronger than before. The study confirms this pattern.

Score breakdown, mechanism chain, raw evidence, ideal studies needed & 1 supporting studies

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