Study disputes L-arginine muscular performance claims11 September 2012A new US study has found no link between consumption of supplements containing L-arginine and improved muscular performance. Scientists at Mississippi State University tested the effects of L-arginine alpha-ketoglutarate (AAKG) consumption on muscular strength and endurance in eight trained and untrained males in resistance tests. The study, which was published in the Journal of the Society of Sports Nutrition, concluded that intake of AAKG in supplement form provided no ergogenic benefit in the participants. Performance in subjects after taking AAKG and a placebo was almost identical. “Based on the current study an acute ingestion of AAKG is not recommended for healthy individuals to increase maximal strength and muscular endurance for resistance training exercises,” said the researchers. Supplements containing L-arginine-containing are typically sold as “nitric oxide stimulators” which increase muscular strength and endurance through the positive effect that arginine has on blood flow through enzyme nitric oxide synthase. Source: Journal of the International Society of Sports Nutrition 2012 9:17 ‘Acute L-arginine alpha ketoglutarate supplementation fails to improve muscular performance in resistance trained and untrained men’ Benjamin Wax, Andreas N Kavazis, Heather E Webb and Stanley P Brown | |
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