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 P Kilduff, Scott Drawer, Christian J. Cook

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

OBJECTIVES: Evidence 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.

DESIGN: Single group, quasi-experimental design with repeated measures.

METHOD: Thirty-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 (2×20m), 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).

RESULTS: The 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.

CONCLUSIONS: The 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.

Original languageEnglish
Pages (from-to)312-316
Number of pages5
JournalJournal of Science and Medicine in Sport
Volume21
Issue number3
Early online date2 Jun 2017
DOIs
Publication statusPublished - 1 Mar 2018

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Football
Exercise Test
Hydrocortisone
Testosterone
Competitive Behavior
Aptitude
Sports
Research Design
Biomarkers

Cite this

Crewther, Blair T ; Potts, Neil ; Kilduff, Liam P ; Drawer, Scott ; Cook, Christian J. / Can salivary testosterone and cortisol reactivity to a mid-week stress test discriminate a match outcome during international rugby union competition?. In: Journal of Science and Medicine in Sport. 2018 ; Vol. 21, No. 3. pp. 312-316.
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abstract = "OBJECTIVES: Evidence 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.DESIGN: Single group, quasi-experimental design with repeated measures.METHOD: Thirty-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 (2×20m), 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).RESULTS: The 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.CONCLUSIONS: The 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.",
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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? / Crewther, Blair T; Potts, Neil; Kilduff, Liam P; Drawer, Scott; Cook, Christian J.

In: Journal of Science and Medicine in Sport, Vol. 21, No. 3, 01.03.2018, p. 312-316.

Research output: Contribution to journalArticle

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T1 - Can salivary testosterone and cortisol reactivity to a mid-week stress test discriminate a match outcome during international rugby union competition?

AU - Crewther, Blair T

AU - Potts, Neil

AU - Kilduff, Liam P

AU - Drawer, Scott

AU - Cook, Christian J.

N1 - Copyright © 2017 Sports Medicine Australia. Published by Elsevier Ltd. All rights reserved.

PY - 2018/3/1

Y1 - 2018/3/1

N2 - OBJECTIVES: Evidence 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.DESIGN: Single group, quasi-experimental design with repeated measures.METHOD: Thirty-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 (2×20m), 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).RESULTS: The 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.CONCLUSIONS: The 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.

AB - OBJECTIVES: Evidence 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.DESIGN: Single group, quasi-experimental design with repeated measures.METHOD: Thirty-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 (2×20m), 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).RESULTS: The 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.CONCLUSIONS: The 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.

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KW - Testosterone/metabolism

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KW - Saliva/chemistry

KW - Competitive Behavior/physiology

KW - Exercise Test/methods

KW - Young Adult

KW - Football/physiology

KW - Athletic Performance/physiology

KW - Non-Randomized Controlled Trials as Topic

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