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Hydrolysed Collagen Supplementation Enhances Patellar Tendon Adaptations to 12 Weeks' Resistance Training in Middle-Aged Men

Christopher D Nulty, Kieran Phelan, Robert M Erskine
European Journal of Sport Science 2025 25(4):e12281

Bibliography

PubMed
PMID 40100255
PubMed Central
PMC11917387
Funding
The authors received no specific funding for this work.
Competing interests
The authors declared no conflicts of interest.

Study snapshot

DesignDouble-blind randomized placebo-controlled 12-week resistance-training trial
ModelMen aged 47 ± 5 years
Sample20 middle-aged recreationally active men; collagen 9, placebo 11
Intervention30 g hydrolysed collagen + 50 mg vitamin C after exercise versus isocaloric maltodextrin + vitamin C; exercise twice weekly
Duration12 weeks
EndpointsPatellar tendon cross-sectional area; Tendon stiffness and Young's modulus; Knee strength; Muscle thickness

What the study showed, in plain terms

High-dose collagen plus exercise improved patellar tendon size, stiffness and modulus more than exercise with placebo. Muscle strength improved with training in both groups without an additional collagen effect.

Key findings

Patellar CSA +6.8 versus +1.2 mm²; stiffness and modulus improved more with collagen; no group difference in strength or muscle thickness.

What this study can and cannot tell us

Only 20 men, 30-g dose and vitamin C plus training. Not evidence that a 10-g generic powder prevents tendon injury or builds more muscle.

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