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New study links collagen to explosive strength gains
A 16-week trial found collagen supplements increased muscle and tendon stiffness and explosive strength in a small group of volunteers, but no size or maximum strength gains.
A Japanese trial tests whether daily collagen peptides alter tissue stiffness and explosive power.
New Study Links Collagen to Explosive Strength Gains
Researchers at Juntendo University, in collaboration with Morinaga & Co., studied 16 weeks of daily 10-gram collagen peptide supplements in 50 volunteers, split evenly with a placebo. The study isolated supplementation from changes in exercise or diet.
Using MRI and ultrasound, they measured Achilles tendon and calf muscle stiffness, along with strength and power tests. The results showed no changes in tissue size or maximum strength, but both muscle and tendon stiffness increased in the collagen group, and the rate of torque development rose, indicating greater explosive strength. Individual gains aligned with higher stiffness, though tendon stiffness did not show a clear link to explosive force.
Key Takeaways
"A single study is not a verdict, but it nudges a closer look at collagen."
Editorial assessment of evidence
"Stiffness rose without size gains, hinting at a different route to power."
Key finding highlight
"If collagen shapes tendon and muscle stiffness, the claim deserves a closer look."
Mechanistic interpretation
"Industry funding is a factor readers should weigh when results look promising."
Funders and interpretation
The study advances a hypothesis that collagen provides building blocks for connective tissue beyond simple digestion into amino acids. If confirmed, it would shift the narrative around supplements that have long promised a range of benefits.
But serious caveats remain: small sample size, relatively short duration, and a sponsor with a stake in positive results. Skeptics will want independent trials with diverse populations and longer follow-up.
Highlights
- A single study is not a verdict, but it nudges a closer look at collagen.
- Stiffness rose without size gains hinting at a different route to power.
- If collagen shapes tendon and muscle stiffness, the claim deserves a closer look.
- Industry funding is a factor readers should weigh when results look promising.
Potential conflict of interest due to industry funding
The study used collagen peptides and was conducted with Morinaga & Co., a company that sells related products. This sponsorship could influence study design, interpretation, or emphasis. Independent replication is needed.
Science evolves with better methods and more data.
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