Journal
EUROPEAN JOURNAL OF APPLIED PHYSIOLOGY
Volume 107, Issue 4, Pages 455-461Publisher
SPRINGER
DOI: 10.1007/s00421-009-1146-y
Keywords
High-intensity; Cycle ergometry; Boys; Saliva; Testosterone; Cortisol; Immunoglobulin (A)
Categories
Funding
- Centre for Biomedical Sciences at the University of Wales Institute
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This study investigated the effect of repeated bouts of short-term, high-intensity cycling exercise on the salivary cortisol, testosterone and immunoglobulin (A) concentrations of 15-16 year old boys. Seventeen apparently healthy schoolchildren (aged 15.5 +/- A 0.4 years) participated in this study. All participants completed 6 x 8 s sprints, interspersed with 30 s recovery intervals on a cycle ergometer. Using the passive drool method, salivary samples were taken before, and 5 min after, exercise. The group mean for peak power output was 723.1 +/- A 180.3 s. There were significant changes (p a parts per thousand currency sign 0.05) in both SalT and SalC, 5 min after completing 6 x 8 s cycle sprints. No significant differences (p > 0.05) were recorded for SIg(A). The increases in SalT and SalC reported in this study confirm that repeated bouts of short-term, high-intensity exercise produces significant physiological hormonal responses in adolescent boys, but does not affect mucosal immune function.
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