Document Detail

Pre-exercise alkalosis and acid-base recovery.
MedLine Citation:
PMID:  18004683     Owner:  NLM     Status:  MEDLINE    
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 BW NaHCO3 ingestion with passive recovery (BICARB P), 0.3 (-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.
J C Siegler; S Keatley; A W Midgley; A M Nevill; L R McNaughton
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Publication Detail:
Type:  Journal Article; Randomized Controlled Trial     Date:  2007-11-14
Journal Detail:
Title:  International journal of sports medicine     Volume:  29     ISSN:  0172-4622     ISO Abbreviation:  Int J Sports Med     Publication Date:  2008 Jul 
Date Detail:
Created Date:  2008-06-19     Completed Date:  2008-10-30     Revised Date:  2008-11-21    
Medline Journal Info:
Nlm Unique ID:  8008349     Medline TA:  Int J Sports Med     Country:  Germany    
Other Details:
Languages:  eng     Pagination:  545-51     Citation Subset:  IM    
Department of Sport, Health and Exercise Science, University of Hull, Hull, United Kingdom.
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MeSH Terms
Acid-Base Equilibrium / physiology*
Alkalosis / blood*
Bicycling / physiology
Carbon Dioxide / blood
Double-Blind Method
Hydrogen-Ion Concentration
Lactic Acid / blood
Oxygen / blood
Physical Exertion / physiology
Recovery of Function / physiology*
Sodium Bicarbonate / administration & dosage*
Reg. No./Substance:
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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