Carbohydrate-gel supplementation and endurance performance during intermittent high-intensity shuttle running

Patterson, Stephen D; Gray, Susan

Abstract

The aim of this study was to investigate the effects of a carbohydrate (CHO) gel on performance after prolonged intermittent high-intensity shuttle running. Seven male soccer players performed 2 exercise trials, 7 d apart. On each occasion, participants completed five 15-min periods of intermittent variable-speed running, interspersed with periods of walking (Part A), followed by an intermittent run to exhaustion (Part B). Participants consumed either a CHO gel or placebo (PLA) immediately before exercise (0.89 mL/kg body mass [BM]) and every 15 min thereafter (0.35 mL/kg BM). In addition, water was consumed at a rate of 5 mL/kg BM before and 2 mL/kg BM every 15 min during exercise. Blood glucose levels were higher (P < 0.05) at 15, 30, and 60 min of exercise and at exhaustion in CHO than in PLA. During Part B, run time to exhaustion was longer (P < 0.05) in the CHO trial (CHO 6.1 ± 1.3 min vs. PLA 4.2 ± 1.2 min). These results indicate that ingesting a CHO gel, along with water, improves performance after prolonged intermittent running in healthy male subjects, possibly by maintaining blood glucose levels during exercise.

Citation

Patterson, S. D., & Gray, S. (2007). Carbohydrate-gel supplementation and endurance performance during intermittent high-intensity shuttle running. International Journal of Sport Nutrition and Exercise Metabolism, 17,

• Journal Article Type: Article
• Publication Date: Oct 1, 2007
• Deposit Date: Jun 24, 2008
• Print ISSN: 1526-484X
• Electronic ISSN: 1543-2742
• Publisher: Human Kinetics
• Peer Reviewed: Peer Reviewed
• Volume: 17
• Keywords: Carbohydrate gel; Shuttle running; Blood glucose levels
• Public URL: http://researchrepository.napier.ac.uk/id/eprint/1653
• Publisher URL: http://www.humankinetics.com/IJSNEM/viewarticle.cfm?jid=kkKERv2NjuVNPk6nxfMWBbGsuxNJP84GzcZN&aid=11136&site=kkKERv2NjuVNPk6nxfMWBbGsuxNJP84GzcZN