Carbohydrate-Electrolyte Drink Ingestion and Skill Performance During and After 2 hr of Indoor Tennis Match Play

• Autores: Kirsty A. McRae, Stuart D.R. Galloway
• Localización: International journal of sport nutrition and exercise metabolism, ISSN 1526-484X, ISSN-e 1543-2742, Vol. 22, Nº. 1, 2012, págs. 38-46
• Idioma: inglés
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• Dialnet Métricas: 1 Cita
• Resumen

  • Twenty-two tennis players were individually studied on 2 occasions. They performed a prematch skill test, a 2-hr tennis match against an equally ranked opponent, and a postmatch skill test. A carbohydrate-electrolyte (CHO-E; Lucozade Sport) or flavor-matched placebo-electrolyte (PL) beverage was administered in a double-blind fashion. During the trials, heart-rate and movement intensity were monitored, and the match was recorded for performance analysis. There were no differences in skill-test scores pre- to postmatch or between trials (154 ± 38 pre- and 160 ± 35 postmatch on PL, 155 ± 36 pre- and 165 ± 33 postmatch on CHO-E). CHO-E ingestion elevated blood glucose concentration throughout the match, and participants reported feeling more energetic (general activation) and more tense (high activation) 1 hr into the match than at baseline (p < .05). Participants in the CHO-E trial spent more time in moderate-intensity activity and less time in low-intensity activity than on PL. Performance analysis revealed that CHO-E ingestion increased overall serve success (M ± SD, 68% ± 7% for CHO-E vs. 66% ± 7% for PL; p < .05) and success of first serves (65% ± 9% for CHO-E, 61% ± 7% for PL; p < .01) and serves to the advantage side (70% ± 9% for CHO-E, 66% ± 7% for PL; p < .05). Return success was greater during the second set of the match (p < .05) in the CHO-E trial. Differences in serve and return success were not associated with blood glucose response to CHO or player ability.