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    Reliability of salivary cortisol and testosterone to a high-intensity cycling protocol to highlight overtraining

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    Authors
    Hough, John
    Leal, Diogo Luis Campos Vaz
    Scott, Gemma
    Taylor, Lee
    Townsend, Dominic
    Gleeson, Michael
    Affiliation
    Nottingham Trent University
    University of Bedfordshire
    University Institute of Maia
    Loughborough University
    University of Technology Sydney
    Issue Date
    2021-04-27
    Subjects
    salivary cortisol
    testosterone
    cycling
    overtraining
    
    Metadata
    Show full item record
    Abstract
    Athletes physically overload to improve performance. Unbalanced stress/recovery may induce overtraining, which is difficult to diagnosis as no diagnostic marker exists. Hormonal responses to a 55/80 cycle (30-min of alternating blocks of 1-min at 55% and 4-min at 80% maximum work rate) may highlight early-stage overtraining (overreaching), as blunted cortisol and testosterone responses to 55/80 follows intensified training. However, the reliability of hormonal responses to 55/80 when not overreached is unknown. Therefore, reported blunted hormonal responses could be due to inconsistent cortisol and testosterone responses to 55/80. Participants (n = 23) completed three 55/80 bouts, >7 days apart, with no exercise 24 h pre-trials. Pre-exercise urine osmolality and stress questionnaire responses were measured. Pre, post, and 30-min post-exercise saliva samples were collected for cortisol and testosterone assessment. Salivary cortisol and testosterone responses, osmolality and well-being were not different between trials. Salivary cortisol and testosterone elevated from pre- to post-exercise [by 4.2 nmol.L-1 (cortisol) and 307 pmol.L-1 (testosterone)], and 30 min post-exercise [by 160 pmol.L-1 (testosterone) only]. Intraclass correlation coefficients for pre to peak post-exercise cortisol (0.89; good) and testosterone (0.53; moderate) were calculated. This demonstrates that 55/80 induces reliable elevations of salivary cortisol and testosterone when in a healthy state.
    Citation
    Hough J, Leal D, Scott G, Taylor L, Townsend D, Gleeson M (2021) 'Reliability of salivary cortisol and testosterone to a high-intensity cycling protocol to highlight overtraining', Journal of Sports Sciences, 39 (18), pp.2080-2086.
    Publisher
    Taylor & Francis
    Journal
    Journal of Sports Sciences
    URI
    http://hdl.handle.net/10547/624976
    DOI
    10.1080/02640414.2021.1918362
    PubMed ID
    33906585
    Additional Links
    https://www.tandfonline.com/doi/abs/10.1080/02640414.2021.1918362
    http://irep.ntu.ac.uk/id/eprint/42802/
    Type
    Article
    Language
    en
    ISSN
    0264-0414
    EISSN
    1466-447X
    ae974a485f413a2113503eed53cd6c53
    10.1080/02640414.2021.1918362
    Scopus Count
    Collections
    Sport and physical activity

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