| Pre-exercise alkalosis and acid-base recovery. | |
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MedLine Citation:
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PMID: 18004683 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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The aim of this study was to observe the influence of pre-exercise sodium bicarbonate (NaHCO3) ingestion and varying recovery modes on acid-base recovery from a single bout of supramaximal exercise. Nine male subjects completed four separate, randomized cycle ergometer exercise trials to volitional fatigue at 120% maximum power output, under the following conditions: 0.3 g.kg(-1) BW NaHCO3 ingestion with passive recovery (BICARB P), 0.3 g.kg (-1) BW NaHCO3 ingestion with active recovery (BICARB A), placebo ingestion with passive recovery (PLAC P) and placebo ingestion with active recovery (PLAC A). Capillary blood samples were obtained every minute for 15 min during recovery. Significant main effects for pH were observed for time (F = 42.1, p < 0.001), intervention (BICARB and PLAC) (F = 1117.3, p < 0.001) and recovery condition (F = 150.0, p < 0.001), as the BICARB condition reduced acid-base perturbation. Significant interaction effects were observed between conditions (BICARB and PLAC) for active and passive recovery modes (F = 29.1, p < 0.001) as the active recovery facilitated H+ removal better than the passive condition. Pre-exercise alkalosis attenuates blood acid-base perturbations from supramaximal exercise to exhaustion, regardless of whether the recovery mode is active or passive. These findings suggest that individuals may benefit from introducing a pre-exercise alkalotic condition while including passive recovery during high-intensity training protocols. |
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Authors:
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J C Siegler; S Keatley; A W Midgley; A M Nevill; L R McNaughton |
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Publication Detail:
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Type: Journal Article; Randomized Controlled Trial Date: 2007-11-14 |
Journal Detail:
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Title: International journal of sports medicine Volume: 29 ISSN: 0172-4622 ISO Abbreviation: Int J Sports Med Publication Date: 2008 Jul |
Date Detail:
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Created Date: 2008-06-19 Completed Date: 2008-10-30 Revised Date: 2008-11-21 |
Medline Journal Info:
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Nlm Unique ID: 8008349 Medline TA: Int J Sports Med Country: Germany |
Other Details:
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Languages: eng Pagination: 545-51 Citation Subset: IM |
Affiliation:
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Department of Sport, Health and Exercise Science, University of Hull, Hull, United Kingdom. J.Siegler@hull.ac.uk |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Acid-Base Equilibrium
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physiology* Adult Alkalosis / blood* Bicycling / physiology Carbon Dioxide / blood Double-Blind Method Ergometry Humans Hydrogen-Ion Concentration Lactic Acid / blood Male Oxygen / blood Physical Exertion / physiology Recovery of Function / physiology* Sodium Bicarbonate / administration & dosage* |
| Chemical | |
Reg. No./Substance:
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124-38-9/Carbon Dioxide; 144-55-8/Sodium Bicarbonate; 50-21-5/Lactic Acid; 7782-44-7/Oxygen |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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