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  • The effect of exercise on innate mucosal immunity

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    54524_1.pdf (189.6Kb)
    Author(s)
    West, NP
    Pyne, DB
    Kyd, JM
    Renshaw, GM
    Fricker, PA
    Cripps, AW
    Griffith University Author(s)
    Renshaw, Gillian M.
    Cripps, Allan W.
    West, Nic P.
    Pyne, David B.
    Year published
    2010
    Metadata
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    Abstract
    We conducted a prospective observational study comparing salivary lactoferrin and lysozyme concentration over five months (chronic changes) in elite rowers (n=17, mean age 24.3 ᠴ.0y) with sedentary individuals (controls) (n=18, mean age = 27.2 ᠷ.1 y) and a graded exercise test to exhaustion (acute changes) with a cohort of elite rowers (n=11, mean age 24.7 ᠴ.1). Magnitudes of differences and changes were interpreted as a standardized (Cohen's) effect size (ES). Lactoferrin concentration in the observational study was approximately 60% lower in rowers than control subjects at baseline (7.9 ᠱ.2 姮ml-1 mean ᠓EM, 19.4 ᠵ.6 ...
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    We conducted a prospective observational study comparing salivary lactoferrin and lysozyme concentration over five months (chronic changes) in elite rowers (n=17, mean age 24.3 ᠴ.0y) with sedentary individuals (controls) (n=18, mean age = 27.2 ᠷ.1 y) and a graded exercise test to exhaustion (acute changes) with a cohort of elite rowers (n=11, mean age 24.7 ᠴ.1). Magnitudes of differences and changes were interpreted as a standardized (Cohen's) effect size (ES). Lactoferrin concentration in the observational study was approximately 60% lower in rowers than control subjects at baseline (7.9 ᠱ.2 姮ml-1 mean ᠓EM, 19.4 ᠵ.6 姮ml-1, P=0.05, ES=0.68, 'moderate') and at the midpoint of the season (6.4 ᠱ.4 姮ml-1 mean ᠓EM, 21.5 ᠴ.2 姮ml-1, P=0.001, ES=0.89, 'moderate'). The concentration of lactoferrin at the end of the study was not statistically significant (P=0.1) between the groups. There was no significant difference between rowers and control subjects in lysozyme concentration during the study. There was a 50% increase in the concentration of lactoferrin (P=0.05, ES=1.04, 'moderate') and 55% increase in lysozyme (P=0.01, ES=3.0, 'very large') from pre-exercise to exhaustion in the graded exercise session. Lower concentrations of these proteins may be indicative of an impairment of innate protection of the upper respiratory tract. Increased salivary lactoferrin and lysozyme concentration following exhaustive exercise may be due to a transient activation response that increases protection in the immediate post exercise period.
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    Journal Title
    British Journal of Sports Medicine
    Volume
    44
    Publisher URI
    http://bjsm.bmj.com/
    DOI
    https://doi.org/10.1136/bjsm.2008.046532
    Copyright Statement
    © The Author(s) 2008. The attached file is posted here with permission of the copyright owners for your personal use only. No further distribution permitted. For information about this journal please refer to the publisher's website or contact the authors.
    Subject
    Innate Immunity
    Engineering
    Medical and Health Sciences
    Education
    Publication URI
    http://hdl.handle.net/10072/22113
    Collection
    • Journal articles

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