Dietary supplements and other ergogenic aids are popular among athletes. Recent studies have shown that nutritional mixtures containing protein hydrolysates, added leucine, and high-glycaemic carbohydrates greatly augment insulin secretion compared with high-glycaemic carbohydrates only. When post-exercise hyperinsulinaemia is supported by hyperaminoacidaemia induced by protein hydrolysate and leucine ingestion, net protein deposition in muscle should occur. Thus, consumption of post-exercise recovery drinks containing these nutrients in conjunction with appropriate resistance training may lead to increased skeletal muscle hypertrophy and strength. However, the long-term effects on body composition and exercise performance remain to be determined.
- CHO, carbohydrate
- IGF-I, insulin-like growth factor I
- amino acids
- protein hydrolysate
- sports nutrition
- ergogenic aids
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Published Online First 1 September 2006
Competing interests: The author is a consultant to BioQuest Pharmaceuticals, Inc.