Effects of Supplemental GAKIC Ingestion on Resistance Training Performance in Trained Men

Purpose: Glycine-arginine-alpha-ketoisocaproic acid (GAKIC) is a relatively new supplement that athletes and fitness enthusiasts ingest to enhance performance during anaerobic exercise. Therefore, the purpose of this study was to investigate the potential ergogenic effects of GAKIC ingestion during...

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Bibliographic Details
Published in:Research quarterly for exercise and sport 2013-06, Vol.84 (2), p.245-251
Main Authors: Wax, Benjamin, Kavazis, Andreas N., Brown, Stanley P., Hilton, Laura
Format: Article
Language:English
Subjects:
Adult
Analysis of Variance
Athletic Performance
Blood Glucose - analysis
Blood Pressure - drug effects
Caproates - administration & dosage
Cross-Over Studies
Dietary Supplements
Double-Blind Method
Exercise
Fatigue
Fatigue (Biology)
fitness
Heart
Heart rate
Heart Rate - drug effects
Humans
Lactic Acid - blood
Male
Males
Mens health
Physical Fitness - physiology
Protein synthesis
Repetition
Research Methodology
Resistance Training
Scientific Concepts
strength
Studies
training load
Young Adult
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Summary:Purpose: Glycine-arginine-alpha-ketoisocaproic acid (GAKIC) is a relatively new supplement that athletes and fitness enthusiasts ingest to enhance performance during anaerobic exercise. Therefore, the purpose of this study was to investigate the potential ergogenic effects of GAKIC ingestion during multiple bouts of resistance exercise. Method: Seven resistance-trained men participated in a randomized, counterbalanced, double-blind study. Participants were randomly assigned to placebo or GAKIC (10.2 g) and performed 5 sets of 75% of 1-repetition maximum leg press to failure. Total load volume was calculated by multiplying the 75% of 1-repetition maximum mass lifted by the sum of repetitions to failure. One week later, participants ingested the other supplement (placebo or GAKIC) and the same exercise protocol was performed (i.e., crossover). Blood lactate, glucose, and heart rate were determined preexercise and immediately postexercise. Results: GAKIC supplementation significantly increased leg-press total load volume (GAKIC = 31,564 ± 9,132 kg; placebo = 25,763 ± 6,595 kg, p 
ISSN:0270-1367
2168-3824
DOI:10.1080/02701367.2013.784845