title: Impact of fluid restriction and ad libitum water intake or an 8% carbohydrate-electrolyte beverage on skill performance of elite adolescent basketball players.
abstract: Twelve adolescent athletes underwent, in a crossover-design study, 3 separate 90-min training sessions in the following conditions: no fluid ingestion allowed (NF), ad libitum ingestion of water (W), and ad libitum ingestion of a commercial 8% carbohydrate-electrolyte sports beverage (CSB). After each session athletes performed a set of basketball drills (2-point, 3-point, and free-throw shootout, suicide sprints, and defensive zigzags). Body weight (before and after sessions), rating of perceived exertion (RPE), urine color, and beverage acceptability were determined in each session. Athletes also completed a survey about their knowledge and behaviors regarding hydration and fluid replacement. The percentage of weight loss was significantly higher in NF (2.46% ± 0.87%) than in the other 2 conditions (W, 1.08% ± 0.67%, p = .006; CSB, 0.65% ± 0.62%, p = .001) but also higher in W than CSB (p = .012). RPE was higher in NF (16.8 ± 1.96) than in the W (14.2 ± 1.99, p = .004) and CSB (13.3 ± 2.06, p = .002) trials. Athletes' fluid intake was positively correlated with proper self-reported behaviors (r = .75, p = .005) and knowledge (r = .76, p = .004) about fluid and hydration. In conclusion, fluid restriction during exercise was associated with a greater level of dehydration and increased perceived exertion but had no impact on basketball performance compared with ad libitum drinking of water or a CSB. Athletes with more knowledge about hydration and better self-reported hydration behaviors ingested more fluids during training sessions.
authors: Faculty of Nutrition and Food Sciences, University of Porto, Porto, Portugal.
authors: Pedro
authors: P
authors: Carvalho
authors: Bruno
authors: B
authors: Oliveira
authors: Renata
authors: R
authors: Barros
authors: Patricia
authors: P
authors: Padrão
authors: Pedro
authors: P
authors: Moreira
authors: Vitor Hugo
authors: VH
authors: Teixeira
mesh_terms: D000293:Adolescent; D054874:Athletic Performance / Q000502:physiology*; D001490:Basketball / Q000502:physiology*; D001628:Beverages; D001835:Body Weight / Q000502:physiology; D003258:Consumer Behavior; D018592:Cross-Over Studies; D003681:Dehydration / Q000517:prevention & control / Q000652:urine; D004040:Dietary Carbohydrates / Q000008:administration & dosage* / Q000652:urine; D004326:Drinking / Q000502:physiology*; D004573:Electrolytes / Q000008:administration & dosage* / Q000652:urine; D015438:Health Behavior; D007722:Health Knowledge, Attitudes, Practice; D006801:Humans; D008297:Male; D010807:Physical Endurance / Q000502:physiology; D005082:Physical Exertion / Q000502:physiology; D011134:Polysaccharides / Q000008:administration & dosage / Q000652:urine; D015532:Rehydration Solutions / Q000008:administration & dosage; D012982:Sodium, Dietary / Q000008:administration & dosage / Q000652:urine; D014882:Water-Electrolyte Balance / Q000502:physiology
chemical_list: D004040:Dietary Carbohydrates; D004573:Electrolytes; D011134:Polysaccharides; D015532:Rehydration Solutions; D012982:Sodium, Dietary; C008315:maltodextrin