The Claim

Three weeks of eccentric resistance training improves countermovement jump height by approximately 8% and maximal dynamic knee extension strength by approximately 10% in fit young males, regardless of whether protein supplementation includes collagen peptides.

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.

Quantitative
1 study reviewed
In plain English

In fit young men, performing eccentric resistance training for three weeks leads to an 8% increase in vertical jump height and a 10% increase in knee extension strength, whether or not their protein supplement contains collagen peptides.

See the scientific wording

Three weeks of eccentric resistance training improves countermovement jump height by approximately 8% and maximal dynamic knee extension strength by approximately 10% in fit young males, regardless of whether protein supplementation includes collagen peptides.

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.

    This study found that doing three weeks of special leg-strengthening exercises made young, fit men jump higher and lift more powerfully—by about 8% and 10%—no matter if they drank a protein shake with collagen or not.

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

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