Strength training with this collagen supplement doesn't make middle-aged men significantly stronger in leg presses than taking a placebo.
Scientific Claim
In middle-aged untrained men, resistance training combined with BODYBALANCE® collagen peptides does not result in a statistically significant improvement in isometric leg strength compared to placebo.
Original Statement
“The higher increase in muscle strength by the additional intake of collagen peptides after the training sessions compared with placebo did not reach the level of significance and had an effect size of d = 0.366.”
Evidence Quality Assessment
Claim Status
appropriately stated
Study Design Support
Design supports claim
Appropriate Language Strength
association
Can only show association/correlation
Assessment Explanation
The study design supports causal claims, but since the result is non-significant, the appropriate verb is 'does not result in a statistically significant improvement' which correctly reflects the data.
Evidence from Studies
Supporting (1)
The Influence of Specific Bioactive Collagen Peptides on Body Composition and Muscle Strength in Middle-Aged, Untrained Men: A Randomized Controlled Trial