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    Pre-exercise alkalosis attenuates the heat shock protein 72 response to a single-bout of anaerobic exercise

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    Authors
    Peart, Daniel J.
    McNaughton, Lars R.
    Midgley, Adrian W.
    Taylor, Lee
    Towlson, Christopher
    Madden, Leigh A.
    Vince, Rebecca V.
    Issue Date
    2011-09
    Subjects
    C600 Sports Science
    
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    Abstract
    The heat shock protein 72 (HSP72) response following exercise is well documented, however, little is known on whether the expression may be mediated by the ingestion of ergogenic aids prior to performance. The purpose of this research was to investigate the effect of sodium bicarbonate (NaHCO(3)) ingestion on monocyte and lymphocyte expressed HSP72 and oxidative stress for 4-h post exercise. Seven active males (22.3 ± 2.9 years, 181.6 ± 4.5 cm, 78.1 ± 8.1 kg) performed a 4-min 'all-out' cycle test following a dose of 0.3 g kg(-1) body mass of NaHCO(3), or an equimolar placebo dose of sodium chloride. HSP72 was measured by flow cytometry and oxidative stress was determined via plasma thiobarbituric acid substances (TBARS) analysis. The NaHCO(3) ingestion significantly increased blood pH (p<0.001), bicarbonate (p<0.001) and base excess (p<0.001) pre-exercise. Despite this there was no evidence of a significantly improved exercise performance when compared with the placebo trials (p ≥ 0.26) (means ± SD; average power 292 ± 43 W vs. 291 ± 50 W; peak power 770 ± 218 W vs. 775 ± 211 W; work completed 71 ± 10 kJ vs. 68 ± 10 kJ). Monocyte expressed HSP72 was significantly lower under experimental conditions during the 4-h post-exercise (p=0.013), as was plasma TBARS (p<0.001). These findings suggest that pre-exercise alkalosis can attenuate the stress response to a single bout of anaerobic exercise.
    Citation
    Peart, D. McNaughton, L. Midgley, A. Taylor, L. Towlson, C. Madden, L. and Vince, R. (2011) 'Pre-exercise alkalosis attenuates the heat shock protein 72 response to a single-bout of anaerobic exercise', Journal of Science and Medicine in Sport, 14, pp. 435-440.
    Publisher
    Elsevier
    Journal
    Journal of Science and Medicine in Sport
    URI
    http://hdl.handle.net/10547/295057
    DOI
    10.1016/j.jsams.2011.03.006
    PubMed ID
    21498114
    Additional Links
    http://www.ncbi.nlm.nih.gov/pubmed/21498114
    Type
    Article
    Language
    en
    ISSN
    1878-1861
    ae974a485f413a2113503eed53cd6c53
    10.1016/j.jsams.2011.03.006
    Scopus Count
    Collections
    Applied Sport and Exercise Physiology

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