Allgrove, Judith E., Gomes, Elisa, Hough, John and Gleeson, Michael (2008) Effects of exercise intensity on salivary antimicrobial proteins and markers of stress in active men. Journal of Sports Sciences, 26 (6). pp. 653-661. ISSN 0264-0414 (doi:10.1080/02640410701716790)

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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 (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.

Item Type:	Article
Additional Information:	[1] Version of record first published: 20 May 2008. [2] ISSN 0264-0414 (Print), 1466-447X (Online). [3] Journal of Sports Sciences published on behalf of the British Association of Sport and Exercise Sciences.
Uncontrolled Keywords:	saliva flow rate, immunoglobulin A, lysozyme, chromogranin A, exercise intensity
Subjects:	Q Science > QP Physiology R Medicine > RM Therapeutics. Pharmacology
Faculty / School / Research Centre / Research Group:	Faculty of Education, Health & Human Sciences > School of Human Sciences (HUM)
Related URLs:	Publisher Organisation
Last Modified:	09 Oct 2021 04:46
URI:	http://gala.gre.ac.uk/id/eprint/2179

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