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J Immunol Res. 2014;2014:234565. doi: 10.1155/2014/234565. Epub 2014 Jun 12.

Markers of biological stress and mucosal immunity during a week leading to competition in adolescent swimmers.

Author information

1
Department of Kinesiology, Faculty of Applied Health Sciences, Brock University, St Catharines, ON, Canada L2S 3A1.
2
Department of Psychology, Centre for Neuroscience, Brock University, St Catharines, ON, Canada L2S 3A1.
3
Department of Pediatrics, McMaster University, Hamilton, ON, Canada L8S 4L8.

Abstract

In this study we examined changes in the salivary concentrations of immunoglobulin A (sIgA), cortisol (sC), testosterone (sT), and testosterone-to-cortisol ratio (T/C) in 21 competitive swimmers, 11-15 years old, during a week leading to competition as compared to a control (noncompetition) week. No day-to-day changes or significant differences between weeks were observed for sIgA (47.9 ± 4.4 versus 54.9 ± 5.2 μg/mL for control versus competition week, resp.), sC (2.7 ± 0.2 versus 2.5 ± 0.2 ng/mL for control versus competition week, resp.), and T/C ratio (83.4 ± 7.0 versus 77.9 ± 7.7 for control versus competition week, resp.). In contrast, sT was significantly lower during the week of competition (154.5 ± 11.3 pg/mL) as compared to the control week (181.3 ± 11.5 pg/mL) suggesting that the swimmers were in a catabolic state, although this did not have a negative effect on their performance. In conclusion, salivary cortisol did not change between the two weeks, and thus competition stress was relatively low, and mucosal immunity was unaffected in these young athletes prior to competition.

PMID:
25025080
PMCID:
PMC4082920
DOI:
10.1155/2014/234565
[Indexed for MEDLINE]
Free PMC Article

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