When older men with muscle loss take collagen supplements during strength training, gaining muscle is more closely linked to losing fat compared to those taking a placebo.
Scientific Claim
In elderly men with sarcopenia, the increase in fat-free mass during resistance training is associated with fat mass loss when supplemented with 15g/day collagen peptides (r=0.72), which is stronger than the association seen with placebo (r=0.55).
Original Statement
“Correlation (Pearson’s r) between fat-free mass and fat mass changes after a 12 weeks of resistance training in elderly men (age>65 years, n 26) in combination with a daily dosage of 15 g collagen peptides (r 0·72; P<0·001). Correlation (Pearson’s r) between fat-free mass and fat mass changes after a 12 weeks of resistance training in elderly men (age>65 years, n 26) in the placebo group (r 0·55; P<0·003).”
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 reports correlation coefficients, so 'associated' is appropriate; the verb strength should be 'association' as it's not causal.