Effects of exercise intensity on salivary antimicrobial proteins and markers of stress in active men
Affiliation
Loughborough UniversityIssue Date
2008-04Subjects
saliva flow rateimmunoglobulin A
lysozyme
chromogranin A
exercise intensity
sports science
stress
Metadata
Show full item recordAbstract
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):653Publisher
Taylor & FrancisJournal
Journal of Sports SciencesPubMed ID
18344136Additional Links
http://www.tandfonline.com/doi/abs/10.1080/02640410701716790Type
ArticleLanguage
enISSN
0264-04141466-447X
ae974a485f413a2113503eed53cd6c53
10.1080/02640410701716790