Can salivary testosterone and cortisol reactivity to a mid-week stress test discriminate a match outcome during international rugby union competition?

Crewther, Blair T.; Potts, Neil; Kilduff, Liam; Drawer, Scott; Cook, Christian J.

doi:10.1016/j.jsams.2017.05.021

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Can salivary testosterone and cortisol reactivity to a mid-week stress test discriminate a match outcome during international rugby union competition?

Blair T. Crewther, Neil Potts, Liam Kilduff

, Scott Drawer, Christian J. Cook

Journal of Science and Medicine in Sport

Swansea University Author: Liam Kilduff

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DOI (Published version): 10.1016/j.jsams.2017.05.021

Abstract

ObjectivesEvidence suggests that stress-induced changes in testosterone and cortisol are related to future competitive behaviours and team-sport outcomes. Therefore, we examined whether salivary testosterone and cortisol reactivity to a mid-week stress test can discriminate a match outcome in intern...

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Published in:	Journal of Science and Medicine in Sport
ISSN:	14402440
Published:	2017
Online Access:	Check full text
URI:	https://cronfa.swan.ac.uk/Record/cronfa33933
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first_indexed	2017-05-25T14:07:45Z
last_indexed	2018-02-09T05:23:34Z
id	cronfa33933
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spelling	2017-07-31T14:52:21.6610421 v2 33933 2017-05-25 Can salivary testosterone and cortisol reactivity to a mid-week stress test discriminate a match outcome during international rugby union competition? 972ed9a1dda7a0de20581a0f8350be98 0000-0001-9449-2293 Liam Kilduff Liam Kilduff true false 2017-05-25 STSC ObjectivesEvidence suggests that stress-induced changes in testosterone and cortisol are related to future competitive behaviours and team-sport outcomes. Therefore, we examined whether salivary testosterone and cortisol reactivity to a mid-week stress test can discriminate a match outcome in international rugby union competition.DesignSingle group, quasi-experimental design with repeated measures.MethodThirty-three male rugby players completed a standardised stress test three or four days before seven international matches. Stress testing involved seven minutes of shuttle runs (2 × 20 m), dispersed across one-minute stages with increasing speeds. Salivary testosterone and cortisol were measured in the morning, along with delta changes from morning to pre-test (Morn-PreΔ) and pre-test to post-test (Pre-PostΔ). Data were compared across wins (n = 3) and losses (n = 4).ResultsThe Morn-PreΔ in cortisol increased before winning and decreased prior to losing (p < 0.001), with a large effect size difference (d = 1.6, 90% CI 1.3-1.9). Testosterone decreased significantly across the same period, irrespective of the match outcome. The Morn-PreΔ in testosterone and cortisol, plus the Pre-PostΔ in testosterone, all predicted a match outcome (p ≤ 0.01). The final model showed good diagnostic accuracy (72%) with cortisol as the main contributor.ConclusionsThe salivary testosterone and cortisol responses to mid-week testing showed an ability to discriminate a rugby match outcome over a limited number of games. The Morn-PreΔ in cortisol was the strongest diagnostic biomarker. This model may provide a unique format to assess team readiness or recovery between competitions, especially with the emergence of rapid hormonal testing. Journal Article Journal of Science and Medicine in Sport 14402440 Sport; Behaviour; Readiness; Training; Neuroendocrine 31 12 2017 2017-12-31 10.1016/j.jsams.2017.05.021 COLLEGE NANME Sport and Exercise Sciences COLLEGE CODE STSC Swansea University 2017-07-31T14:52:21.6610421 2017-05-25T10:25:40.5980706 Faculty of Science and Engineering School of Aerospace, Civil, Electrical, General and Mechanical Engineering - Sport and Exercise Sciences Blair T. Crewther 1 Neil Potts 2 Liam Kilduff 0000-0001-9449-2293 3 Scott Drawer 4 Christian J. Cook 5 0033933-05062017095140.pdf crewther2017.pdf 2017-06-05T09:51:40.3900000 Output 617939 application/pdf Accepted Manuscript true 2018-06-02T00:00:00.0000000 true eng
title	Can salivary testosterone and cortisol reactivity to a mid-week stress test discriminate a match outcome during international rugby union competition?
spellingShingle	Can salivary testosterone and cortisol reactivity to a mid-week stress test discriminate a match outcome during international rugby union competition? Liam Kilduff
title_short	Can salivary testosterone and cortisol reactivity to a mid-week stress test discriminate a match outcome during international rugby union competition?
title_full	Can salivary testosterone and cortisol reactivity to a mid-week stress test discriminate a match outcome during international rugby union competition?
title_fullStr	Can salivary testosterone and cortisol reactivity to a mid-week stress test discriminate a match outcome during international rugby union competition?
title_full_unstemmed	Can salivary testosterone and cortisol reactivity to a mid-week stress test discriminate a match outcome during international rugby union competition?
title_sort	Can salivary testosterone and cortisol reactivity to a mid-week stress test discriminate a match outcome during international rugby union competition?
author_id_str_mv	972ed9a1dda7a0de20581a0f8350be98
author_id_fullname_str_mv	972ed9a1dda7a0de20581a0f8350be98_***_Liam Kilduff
author	Liam Kilduff
author2	Blair T. Crewther Neil Potts Liam Kilduff Scott Drawer Christian J. Cook
format	Journal article
container_title	Journal of Science and Medicine in Sport
publishDate	2017
institution	Swansea University
issn	14402440
doi_str_mv	10.1016/j.jsams.2017.05.021
college_str	Faculty of Science and Engineering
hierarchytype
hierarchy_top_id	facultyofscienceandengineering
hierarchy_top_title	Faculty of Science and Engineering
hierarchy_parent_id	facultyofscienceandengineering
hierarchy_parent_title	Faculty of Science and Engineering
department_str	School of Aerospace, Civil, Electrical, General and Mechanical Engineering - Sport and Exercise Sciences{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Aerospace, Civil, Electrical, General and Mechanical Engineering - Sport and Exercise Sciences
document_store_str	1
active_str	0
description	ObjectivesEvidence suggests that stress-induced changes in testosterone and cortisol are related to future competitive behaviours and team-sport outcomes. Therefore, we examined whether salivary testosterone and cortisol reactivity to a mid-week stress test can discriminate a match outcome in international rugby union competition.DesignSingle group, quasi-experimental design with repeated measures.MethodThirty-three male rugby players completed a standardised stress test three or four days before seven international matches. Stress testing involved seven minutes of shuttle runs (2 × 20 m), dispersed across one-minute stages with increasing speeds. Salivary testosterone and cortisol were measured in the morning, along with delta changes from morning to pre-test (Morn-PreΔ) and pre-test to post-test (Pre-PostΔ). Data were compared across wins (n = 3) and losses (n = 4).ResultsThe Morn-PreΔ in cortisol increased before winning and decreased prior to losing (p < 0.001), with a large effect size difference (d = 1.6, 90% CI 1.3-1.9). Testosterone decreased significantly across the same period, irrespective of the match outcome. The Morn-PreΔ in testosterone and cortisol, plus the Pre-PostΔ in testosterone, all predicted a match outcome (p ≤ 0.01). The final model showed good diagnostic accuracy (72%) with cortisol as the main contributor.ConclusionsThe salivary testosterone and cortisol responses to mid-week testing showed an ability to discriminate a rugby match outcome over a limited number of games. The Morn-PreΔ in cortisol was the strongest diagnostic biomarker. This model may provide a unique format to assess team readiness or recovery between competitions, especially with the emergence of rapid hormonal testing.
published_date	2017-12-31T03:42:05Z
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score	11.036706

Can salivary testosterone and cortisol reactivity to a mid-week stress test discriminate a match outcome during international rugby union competition?

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