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    Effects of exercise intensity on salivary antimicrobial proteins and markers of stress in active men

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    Authors
    Allgrove, Judith E.
    Gomes, Elisa
    Hough, John
    Gleeson, Michael
    Affiliation
    Loughborough University
    Issue Date
    2008-04
    Subjects
    saliva flow rate
    immunoglobulin A
    lysozyme
    chromogranin A
    exercise intensity
    sports science
    stress
    
    Metadata
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    Abstract
    In the present study, we assessed the effects of exercise intensity on salivary immunoglobulin A (s-IgA) and salivary lysozyme (s-Lys) and examined how these responses were associated with salivary markers of adrenal activation. Using a randomized design, 10 healthy active men participated in three experimental cycling trials: 50% maximal oxygen uptake ([Vdot]O2max), 75%[Vdot]O2max, and an incremental test to exhaustion. The durations of the trials were the same as for a preliminary incremental test to exhaustion (22.3 min, s x = 0.8). Timed, unstimulated saliva samples were collected before exercise, immediately after exercise, and 1 h after exercise. In the incremental exhaustion trial, the secretion rates of both s-IgA and s-Lys were increased. An increase in s-Lys secretion rate was also observed at 75%[Vdot]O2max. No significant changes in saliva flow rate were observed in any trial. Cycling at 75%[Vdot]O2max and to exhaustion increased the secretion of α-amylase and chromogranin A immediately after exercise; higher cortisol values at 75%[Vdot]O2max and in the incremental exhaustion trial compared with 50%[Vdot]O2max were observed 1 h immediately after exercise only. These findings suggest that short-duration, high-intensity exercise increases the secretion rate of s-IgA and s-Lys despite no change in the saliva flow rate. These effects appear to be associated with changes in sympathetic activity and not the hypothalamic – pituitary – adrenal axis.
    Citation
    Allgrove, J.E., Gomes, E., Hough, J., Gleeson, M. (2008) 'Effects of exercise intensity on salivary antimicrobial proteins and markers of stress in active men' Journal of Sports Sciences 26 (6):653
    Publisher
    Taylor & Francis
    Journal
    Journal of Sports Sciences
    URI
    http://hdl.handle.net/10547/578572
    DOI
    10.1080/02640410701716790
    PubMed ID
    18344136
    Additional Links
    http://www.tandfonline.com/doi/abs/10.1080/02640410701716790
    Type
    Article
    Language
    en
    ISSN
    0264-0414
    1466-447X
    ae974a485f413a2113503eed53cd6c53
    10.1080/02640410701716790
    Scopus Count
    Collections
    Applied Sport and Exercise Physiology

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