title: Carbohydrate gel ingestion significantly improves the intermittent endurance capacity, but not sprint performance, of adolescent team games players during a simulated team games protocol.
abstract: The aim of this study was to investigate the influence of ingesting a carbohydrate (CHO) gel on the intermittent endurance capacity and sprint performance of adolescent team games players. Eleven participants [mean age 13.5 ± 0.7 years, height 1.72 ± 0.08 m, body mass (BM) 62.1 ± 9.4 kg] performed two trials separated by 3-7 days. In each trial, they completed four 15 min periods of part A of the Loughborough Intermittent Shuttle Test (LIST), followed by an intermittent run to exhaustion (part B). In the 5 min pre-exercise, participants consumed 0.818 mL kg(-1) BM of a CHO or a non-CHO placebo gel, and a further 0.327 mL kg(-1) BM every 15 min during part A of the LIST (38.0 ± 5.5 g CHO h(-1) in the CHO trial). Intermittent endurance capacity was increased by 21.1% during part B when the CHO gel was ingested (4.6 ± 2.0 vs. 3.8 ± 2.4 min, P < 0.05, r = 0.67), with distance covered in part B significantly greater in the CHO trial (787 ± 319 vs. 669 ± 424 m, P < 0.05, r = 0.57). Gel ingestion did not significantly influence mean 15 m sprint time (P = 0.34), peak sprint time (P = 0.81), or heart rate (P = 0.66). Ingestion of a CHO gel significantly increases the intermittent endurance capacity of adolescent team games players during a simulated team games protocol.
authors.affiliation: Institute of Sport, Physical Education and Health Sciences, University of Edinburgh, St Leonards Land, Holyrood Road, Edinburgh, EH8 8AQ, UK. S.M.Phillips@sms.ed.ac.uk
authors.forename: Shaun M
authors.initials: SM
authors.lastname: Phillips
authors.forename: Anthony P
authors.initials: AP
authors.lastname: Turner
authors.forename: Mark F
authors.initials: MF
authors.lastname: Sanderson
authors.forename: John
authors.initials: J
authors.lastname: Sproule
mesh_terms: D000054:Acceleration; D000293:Adolescent; D054874:Athletic Performance / Q000502:physiology; D002648:Child; D003198:Computer Simulation; D004040:Dietary Carbohydrates / Q000008:administration & dosage / Q000494:pharmacology*; D004311:Double-Blind Method; D004435:Eating / Q000187:drug effects / Q000502:physiology; D005260:Female; D005538:Football / Q000502:physiology; D005782:Gels; D006688:Hockey / Q000502:physiology; D006801:Humans; D008297:Male; D010507:Periodicity; D010807:Physical Endurance / Q000187:drug effects* / Q000502:physiology; D010988:Play and Playthings; D012420:Running / Q000502:physiology; D012916:Soccer / Q000502:physiology
chemical_list: D004040:Dietary Carbohydrates; D005782:Gels