Arginine and Ornithine Supplementation Increases Growth Hormone and Insulin-Like Growth Factor-1 Serum Levels After Heavy-Resistance Exercise in Strength-Trained Athletes

  title={Arginine and Ornithine Supplementation Increases Growth Hormone and Insulin-Like Growth Factor-1 Serum Levels After Heavy-Resistance Exercise in Strength-Trained Athletes},
  author={Adam Zając and Stanisław Poprzȩcki and Aleksandra Żebrowska and Małgorzata Chalimoniuk and J{\'o}zef Langfort},
  journal={Journal of Strength and Conditioning Research},
This placebo-controlled double-blind study was designed to investigate the effect of arginine and ornithine (arg and orn) supplementation during 3-week heavy-resistance training on serum growth hormone/insulin-like growth factor-1/insulin-like growth factor-binding protein 3 (GH/IGF-1/IGFBP-3), testosterone, cortisol, and insulin levels in experienced strength-trained athletes. [] Key Method The subjects were randomly divided between a placebo group (n = 8) and the l-Arg/l-Orn-supplemented group (n = 9), and…

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