Reliability of salivary cortisol and testosterone to a high-intensity cycling protocol to highlight overtraining
Leal, Diogo Luis Campos Vaz
AffiliationNottingham Trent University
University of Bedfordshire
University Institute of Maia
University of Technology Sydney
MetadataShow full item record
AbstractAthletes 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.
CitationHough 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.
PublisherTaylor & Francis
JournalJournal of Sports Sciences
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