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    Blunting of exercise-induced salivary testosterone in elite-level triathletes with a 10-day training camp

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    Authors
    Hough, John
    Robertson, Caroline
    Gleeson, Michael
    Issue Date
    2015-12-31
    Subjects
    triathlon
    salivary cortisol,
    salivary cortisol
    endocrine
    exercise training
    
    Metadata
    Show full item record
    Abstract
    Purpose: This study examined the influence of 10 days of intensified training on salivary cortisol and testosterone responses to 30-min, high-intensity cycling (55/80) in a group of male elite triathletes. Methods: Seven elite male triathletes (age 19 ± 1 y, VO2max 67.6 ± 4.5 mL · kg-1 · min-1) completed the study. Swim distances increased by 45%. Running and cycling training hours increased by 25% and 229%, respectively. REST-Q questionnaires assessed mood status before, during, and after the training period. Unstimulated saliva samples were collected before, after, and 30 min after a continuous, high-intensity exercise test. Salivary cortisol and testosterone concentrations were assessed. Results: Compared with pretraining, blunted exercise-induced salivary testosterone responses to the posttraining 55/80 were found (P = .004). The absolute response of salivary testosterone concentrations to the 55/80 decreased pretraining to posttraining from 114% to 85%. No changes were found in exercise-induced salivary cortisol concentration responses to the 55/80. REST-Q scores indicated no changes in the participants' psychological stress-recovery levels over the training camp. Conclusions: The blunted exercise-induced salivary testosterone is likely due to decreased testicular testosterone production and/or secretion, possibly attributable to hypothalamic dysfunction or reduced testicular blood flow. REST-Q scores suggest that the triathletes coped well with training-load elevations, which could account for the finding of no change in the exercise-induced salivary cortisol concentration. Overall, these findings suggest that the 55/80 can detect altered exercise-induced salivary testosterone concentrations in an elite athletic population due to increased training stress. However, this alteration occurs independently of a perceived elevation of training stress.
    Citation
    Hough J, Robertson C, Gleeson M (2015) 'Blunting of exercise-induced salivary testosterone in elite-level triathletes with a 10-day training camp', International Journal of Sports Physiology and Performance, 10 (7), pp.935-938.
    Publisher
    Human Kinetics Publishers Inc.
    Journal
    International Journal of Sports Physiology and Performance
    URI
    http://hdl.handle.net/10547/624414
    DOI
    10.1123/ijspp.2014-0360
    PubMed ID
    25710620
    Additional Links
    https://journals.humankinetics.com/view/journals/ijspp/10/7/article-p935.xml
    Type
    Article
    Language
    en
    ISSN
    1555-0265
    ae974a485f413a2113503eed53cd6c53
    10.1123/ijspp.2014-0360
    Scopus Count
    Collections
    Sport and physical activity

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