Journal of Sports Science and Medicine
Journal of Sports Science and Medicine
ISSN: 1303 - 2968   
Ios-APP Journal of Sports Science and Medicine
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©Journal of Sports Science and Medicine (2002) 01, 47 - 53

Research article
Effects of a Carbohydrate-Electrolyte Drink on Specific Soccer Tests and Performance
Sergej M. Ostojic1, , Sanja Mazic2
Author Information
1 Exercise and Sport Nutrition Laboratory, O.C.A. Sports Medicine Institute, Pancevo, Yugoslavia.
2 Institute of Physiology, School of Medicine, University of Belgrade, Belgrade, Yugoslavia.

Sergej M. Ostojic
✉ Exercise and Sport Nutrition Laboratory, O.C.A. Sports Medicine Institute, Kikindska 13/11, Pancevo 26000, Yugoslavia.
Email: sergej@panet.bits.net
Publish Date
Received: 02-05-2002
Accepted: 07-06-2002
Published (online): 20-06-2002
 
 
ABSTRACT

The aim of this study was to examine the effects of a carbohydrate-electrolyte drink on specific soccer tests and performance. Twenty-two professional male soccer players volunteered to participate in the study. The players were allocated to two assigned trials ingesting carbohydrate-electrolyte drink (7% carbohydrates, sodium 24 mmol.l-1, chloride 12 mmol.l-1, potassium 3 mmol.l-1) or placebo during a 90 min on-field soccer match. The trials were matched for subjects’ age, weight, height and maximal oxygen uptake. Immediately after the match, players completed four soccer-specific skill tests. Blood glucose concentration [mean (SD)] was higher at the end of the match-play in the carbohydrate-electrolyte trial than in the placebo trial (4.4 (0.3) vs. 4.0 (0.3) mmol.l-1, P < 0.05). Subjects in the carbohydrate-electrolyte trial finished the specific dribble test faster in comparison with subjects in the placebo trial (12.9 (0.4) vs. 13.6 (0.5) s, P < 0.05). Ratings of the precision test were higher in the carbohydrate-electrolyte trial as compared to the placebo trial (17.2 (4.8) vs. 15.1 (5.2), P < 0.05) but there were no differences in coordination test and power test results between trials. The main finding of the present study indicates that supplementation with carbohydrate-electrolyte solution improved soccer-specific skill performance and recovery after an on-field soccer match compared with ingestion of placebo. This suggests that soccer players should consume carbohydrate-electrolyte fluid throughout a game to help prevent deterioration in specific skill performance.

Key words: Fluid ingestion, soccer match, blood glucose


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