Document Detail


Effects of exercise intensity on salivary antimicrobial proteins and markers of stress in active men.
MedLine Citation:
PMID:  18344136     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
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 (VO2max), 75%VO2max, 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, sx = 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%VO2max. No significant changes in saliva flow rate were observed in any trial. Cycling at 75%VOmax and to exhaustion increased the secretion of alpha-amylase and chromogranin A immediately after exercise; higher cortisol values at 75%VO2max and in the incremental exhaustion trial compared with 50%VO2max 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.
Authors:
Judith E Allgrove; Elisa Gomes; John Hough; Michael Gleeson
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Journal of sports sciences     Volume:  26     ISSN:  0264-0414     ISO Abbreviation:  J Sports Sci     Publication Date:  2008 Apr 
Date Detail:
Created Date:  2008-03-17     Completed Date:  2008-08-05     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8405364     Medline TA:  J Sports Sci     Country:  England    
Other Details:
Languages:  eng     Pagination:  653-61     Citation Subset:  IM    
Affiliation:
School of Sport and Exercise Sciences, Loughborough University, Loughborough, UK. judithallgrove@hotmail.co.uk
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MeSH Terms
Descriptor/Qualifier:
Adult
Chromogranin A / metabolism*
Cohort Studies
Exercise / physiology*
Exercise Test
Humans
Immunoglobulin A / metabolism*
Male
Muramidase / metabolism*
Saliva / chemistry,  metabolism*
Chemical
Reg. No./Substance:
0/Chromogranin A; 0/Immunoglobulin A; EC 3.2.1.17/Muramidase

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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