| Effects of induced alkalosis on simulated match performance in elite female water polo players. | |
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MedLine Citation:
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PMID: 20601737 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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This study investigated the effects of sodium bicarbonate (NaHCO3) ingestion on simulated water polo match performance. Twelve elite players from the Australian National Women's Water Polo Squad (age 23.7 +/- 3.0 yr, height 1.73 +/- 0.05 m, body mass 75.7 +/- 8.0 kg) participated in the study. In a randomized cross-over double-blind design, players ingested 0.3 g/kg of NaHCO3 or placebo 90 min before performing a 59-min match-simulation test (MST) that included 56 x 10-m maximal-sprint swims as the performance measure. Capillary blood samples were obtained preingestion, pre- and post-warm-up, and after each quarter of the MST. Preexercise ingestion of NaHCO3 was effective in enhancing extracellular pH from baseline levels of 7.41; +/- 0.01 (M; +/- 90% confidence limits) to 7.49; +/- 0.01 and bicarbonate levels from 24.4; +/- 0.3 to 28.5; +/- 0.5 mmol/L. The percentage difference in mean sprint times between trials showed no substantial effects of NaHCO3 (0.4; +/- 1.0, effect size = 0.09; +/- 0.23; p = .51). These findings are contrary to those of previous NaHCO3 studies on simulated team-sport performance, but this investigation is unique in that it examined highly trained athletes performing sport-specific tasks. In conclusion, water polo players should not expect substantial enhancement in intermittent-sprint performance from NaHCO3 supplementation. |
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Authors:
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Frankie Tan; Ted Polglaze; Gregory Cox; Brian Dawson; Iñigo Mujika; Sally Clark |
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Publication Detail:
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Type: Journal Article; Randomized Controlled Trial |
Journal Detail:
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Title: International journal of sport nutrition and exercise metabolism Volume: 20 ISSN: 1526-484X ISO Abbreviation: Int J Sport Nutr Exerc Metab Publication Date: 2010 Jun |
Date Detail:
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Created Date: 2010-07-05 Completed Date: 2010-09-23 Revised Date: 2010-11-01 |
Medline Journal Info:
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Nlm Unique ID: 100939812 Medline TA: Int J Sport Nutr Exerc Metab Country: United States |
Other Details:
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Languages: eng Pagination: 198-205 Citation Subset: IM |
Affiliation:
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Sports Science Dept., Singapore Sports Council, Singapore. |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Alkalosis
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chemically induced,
physiopathology* Athletic Performance Cross-Over Studies Double-Blind Method Female Humans Hydrogen-Ion Concentration Oxygen Consumption / physiology Sodium Bicarbonate / pharmacology* Swimming / physiology* Task Performance and Analysis Young Adult |
| Chemical | |
Reg. No./Substance:
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144-55-8/Sodium Bicarbonate |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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