Arginine and ornithine supplementation increases growth hormone and insulin-like growth factor-1 serum levels after heavy-resistance exercise in strength-trained athletes
Zajac A, Poprzecki S, Zebrowska A, Chalimoniuk M, Langfort J
Published in Journal of Strength and Conditioning Research
Key Findings
Three weeks of L-arginine plus L-ornithine during heavy resistance training raised post-exercise GH and IGF-1 concentrations versus placebo.
Conclusions
Combined arginine/ornithine supplementation amplifies the exercise-induced GH/IGF-1 response.
Limitations
Very small groups (n=8 and n=9), short duration, no performance or body-composition endpoints.
Supplements Studied
Arginine and ornithine supplementation increases growth hormone and insulin-like growth factor-1 serum levels after heavy-resistance exercise in strength-trained athletes
Three weeks of L-arginine plus L-ornithine during heavy resistance training raised post-exercise GH and IGF-1 concentrations versus placebo.
Outcomes Measured
Arginine and ornithine supplementation increases growth hormone and insulin-like growth factor-1 serum levels after heavy-resistance exercise in strength-trained athletes
Three weeks of L-arginine plus L-ornithine during heavy resistance training raised post-exercise GH and IGF-1 concentrations versus placebo.
Study Details
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