title: Does carbohydrate supplementation enhance tennis match play performance?
abstract: BACKGROUND
  Carbohydrate (CHO) ingestion may be an interesting approach to avoid significant decrement to the tennis match performance. The aim of the present investigation was to assess the effects of CHO supplementation on tennis match play performance.
  
  
  METHODS
  Twelve young tennis players (18.0 ± 1.0 years; 176 ± 3.4 cm; 68.0 ± 2.3 kg; body fat: 13.7 ± 2.4%) with national rankings among the top 50 in Brazil agreed to participate in this study, which utilized a randomized, crossover, double blind research design. The experiment was conducted over a 5-day period in which each player completed two simulated tennis matches of a 3-hour duration. The players received either a CHO or a placebo (PLA) drinking solution during simulated tennis matches. Athlete's performance parameters were determined by filming each match with two video cameras. Each player was individually tracked for the entire duration of the match to measure the following variables: (1) games won; (2) rally duration; (3) strokes per rally; (4) effective playing time (%); (5) aces; (6) double faults; (7) first service in; (8) second service in; (9) first return in and (10) second return in.
  
  
  RESULTS
  There were no differences between trials in any of the variables analyzed.
  
  
  CONCLUSIONS
  CHO supplementation did not improve tennis match play performance under the present experimental conditions.
authors.forename: Rodrigo Vitasovic
authors.initials: RV
authors.lastname: Gomes
authors.forename: Caroline Dario
authors.initials: CD
authors.lastname: Capitani
authors.forename: Carlos
authors.initials: C
authors.lastname: Ugrinowitsch
authors.forename: Michael Christopher
authors.initials: MC
authors.lastname: Zourdos
authors.forename: Jaime
authors.initials: J
authors.lastname: Fernandez-Fernandez
authors.forename: Alberto
authors.initials: A
authors.lastname: Mendez-Villanueva
authors.affiliation: School of Arts, Sciences and Humanities, University of São Paulo, Av Arlindo Bettio, 1000, São Paulo 03828-000, Brazil. aoki.ms@usp.br.
authors.forename: Marcelo Saldanha
authors.initials: MS
authors.lastname: Aoki