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    Pre-exercise alkalosis and Acid-base recovery.

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    Authors
    Siegler, J.C.
    Keatley, S.
    Midgley, A.W.
    Nevill, Alan M.
    McNaughton, Lars R.
    Issue Date
    2008
    
    Metadata
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    Abstract
    The aim of this study was to observe the influence of pre-exercise sodium bicarbonate (NaHCO (3)) 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 NaHCO (3) ingestion with passive recovery (BICARB P), 0.3 g . kg (-1) BW NaHCO (3) 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.
    Citation
    International Journal of Sports Medicine, 29(7): 545-551
    Publisher
    Georg Thieme Verlag
    Journal
    International Journal of Sports Medicine
    URI
    http://hdl.handle.net/2436/30458
    DOI
    10.1055/s-2007-989261
    PubMed ID
    18004683
    Additional Links
    http://www.thieme-connect.de/DOI/DOI?10.1055/s-2007-989261
    Type
    Journal article
    Language
    en
    ISSN
    0172-4622
    ae974a485f413a2113503eed53cd6c53
    10.1055/s-2007-989261
    Scopus Count
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    Faculty of Education, Health and Wellbeing

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