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    Plasma and salivary steroid hormone responses of men to high-intensity cycling and resistance exercise

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    Authors
    Hough, John
    Papacosta, Elena
    Wraith, Elizabeth
    Gleeson, Michael
    Issue Date
    2011
    
    Metadata
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    Abstract
    Hormonal responses to exercise could be used as a marker of overreaching. A short exercise protocol that induces robust hormonal elevations in a normal trained state should be able to highlight hormonal changes during overreaching. This study compared plasma and salivary cortisol and testosterone responses to 4 exercise trials; these were (a) continuous cycle to fatigue at 75% peak power output (Wmax) (FAT); (b) 30-minute cycle alternating 1-minute 60% and 1 minute 90% Wmax (60/90); (c) 30-minute cycle alternating 1-minute 55% and 4-minute 80% Wmax (55/80); and (d) Squatting 8 sets of 10 repetitions at 10 repetition maximum (RESIST). Blood and saliva samples were collected pre-exercise and at 0, 10, 20, 30, 40, 50, and 60 minute postexercise. Pre- to postexercise plasma cortisol increased in all exercise trials, except 60/90. Increases in 55/80 remained above pre-exercise levels for the entire postexercise period. Salivary cortisol increased from pre- to postexercise in FAT and 55/80 trials only. Once elevated after 55/80, it remained so for the postexercise period. Plasma testosterone increased from pre- to postexercise in all trials except 55/80. Saliva testosterone increased from pre- to postexercise in all trials with the longest elevation occurring after 55/80. Area under the curve analysis indicated that the exercise response of salivary hormones was greater in all cycle trials (cortisol) and in the 60/90 and 55/80 trials (testosterone) compared with the other trials. This study indicates that the 55/80 cycle protocol induces a prolonged salivary and plasma cortisol and salivary testosterone response compared with the other trials and so may be a useful diagnostic tool of overreaching.
    Citation
    Hough, J. P., Papacosta, E., Wraith, E. and Gleeson, M. (2011) 'Plasma and Salivary Steroid Hormone Responses of Men to High-Intensity Cycling and Resistance Exercise', Journal of Strength and Conditioning Research, 25(1), pp.23-31
    Publisher
    Lippincott, Williams & Wilkins
    Journal
    Journal of Strength and Conditioning Research
    URI
    http://hdl.handle.net/10547/279356
    DOI
    10.1519/JSC.0b013e3181fef8e7
    Additional Links
    http://content.wkhealth.com/linkback/openurl?sid=WKPTLP:landingpage&an=00124278-201101000-00004
    Type
    Article
    Language
    en
    ISSN
    1064-8011
    ae974a485f413a2113503eed53cd6c53
    10.1519/JSC.0b013e3181fef8e7
    Scopus Count
    Collections
    Applied Sport and Exercise Physiology

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