Performance indicators during international rugby union matches are influenced by a combination of physiological and contextual variables

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

doi:10.1016/j.jsams.2019.10.011

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Performance indicators during international rugby union matches are influenced by a combination of physiological and contextual variables

Blair T. Crewther, Neill Potts, Liam Kilduff

, Scott Drawer, Christian J. Cook

Journal of Science and Medicine in Sport, Volume: 23, Issue: 4, Pages: 396 - 402

Swansea University Author: Liam Kilduff

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DOI (Published version): 10.1016/j.jsams.2019.10.011

Abstract

ObjectivesResearch has linked physiological (e.g., hormonal, affective, fatigue) outcomes to performance indicators in rugby competition, but no work has integrated and contextualised these factors within a test-match environment. We addressed this gap by monitoring 29 athletes from a training squad...

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Published in:	Journal of Science and Medicine in Sport
ISSN:	1440-2440
Published:	Elsevier BV 2020
Online Access:	Check full text
URI:	https://cronfa.swan.ac.uk/Record/cronfa52560
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first_indexed	2019-10-24T12:57:18Z
last_indexed	2023-03-14T04:06:29Z
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spelling	2023-03-13T15:44:23.8463300 v2 52560 2019-10-24 Performance indicators during international rugby union matches are influenced by a combination of physiological and contextual variables 972ed9a1dda7a0de20581a0f8350be98 0000-0001-9449-2293 Liam Kilduff Liam Kilduff true false 2019-10-24 STSC ObjectivesResearch has linked physiological (e.g., hormonal, affective, fatigue) outcomes to performance indicators in rugby competition, but no work has integrated and contextualised these factors within a test-match environment. We addressed this gap by monitoring 29 athletes from a training squad across eight international rugby matches.MethodsPre-match (8-9 am) measures of salivary testosterone and cortisol concentrations, sleep duration, pulse rate, muscle soreness, stress, mood, and motivation were taken. Contextual factors were playing time, internal training load (ITL), test-match experience, opponent ranking, and crowd size. Performance was indexed by coach and player ratings of performance (CRP, PRP) and quantitative metrics; offloads, turnovers, runs with ball in hand (RWB), tackles, passes, and defenders beaten (DFB).ResultsMorning cortisol, sleep and mood were positively related to CRP and PRP (standardised coefficient estimates from 0.17 to 0.22). Cortisol, sleep, stress, mood and motivation were associated with one (or more) of turnovers, RWB, tackles, passes and DFB (incidence rate ratio [IRR] from 0.74 to 1.40). Playing time was positively related to all quantitative performance indicators (IRR from 1.01 to 1.04) with ITL, opponent ranking, and crowd size predicting selected outputs (IRR from 0.89 to 1.15). The explanatory models varied (conditional R2 = 0.15 to 0.83) but were generally stronger with both physiological and contextual inputs.ConclusionsMultiple physiological and contextual factors appear to contribute to player performance in international rugby competition. Measurement of these factors may guide training and management practices, a potential practical consequence but also advancing understanding from marker to causal link. Journal Article Journal of Science and Medicine in Sport 23 4 396 402 Elsevier BV 1440-2440 Testing, Endocrine, Adaptation, Readiness, Recovery 1 4 2020 2020-04-01 10.1016/j.jsams.2019.10.011 http://dx.doi.org/10.1016/j.jsams.2019.10.011 COLLEGE NANME Sport and Exercise Sciences COLLEGE CODE STSC Swansea University 2023-03-13T15:44:23.8463300 2019-10-24T10:41:13.5711475 Faculty of Science and Engineering School of Engineering and Applied Sciences - Sport and Exercise Sciences Blair T. Crewther 1 Neill Potts 2 Liam Kilduff 0000-0001-9449-2293 3 Scott Drawer 4 Christian J. Cook 5 52560__15713__0e3aae3ebd6e47cda4ab59b01c612480.pdf crewther2019.pdf 2019-10-24T10:43:45.3937441 Output 1979404 application/pdf Accepted Manuscript true 2020-10-19T00:00:00.0000000 Released under the terms of a Creative Commons Attribution Non-Commercial No Derivatives License (CC-BY-NC-ND). true
title	Performance indicators during international rugby union matches are influenced by a combination of physiological and contextual variables
spellingShingle	Performance indicators during international rugby union matches are influenced by a combination of physiological and contextual variables Liam Kilduff
title_short	Performance indicators during international rugby union matches are influenced by a combination of physiological and contextual variables
title_full	Performance indicators during international rugby union matches are influenced by a combination of physiological and contextual variables
title_fullStr	Performance indicators during international rugby union matches are influenced by a combination of physiological and contextual variables
title_full_unstemmed	Performance indicators during international rugby union matches are influenced by a combination of physiological and contextual variables
title_sort	Performance indicators during international rugby union matches are influenced by a combination of physiological and contextual variables
author_id_str_mv	972ed9a1dda7a0de20581a0f8350be98
author_id_fullname_str_mv	972ed9a1dda7a0de20581a0f8350be98_***_Liam Kilduff
author	Liam Kilduff
author2	Blair T. Crewther Neill Potts Liam Kilduff Scott Drawer Christian J. Cook
format	Journal article
container_title	Journal of Science and Medicine in Sport
container_volume	23
container_issue	4
container_start_page	396
publishDate	2020
institution	Swansea University
issn	1440-2440
doi_str_mv	10.1016/j.jsams.2019.10.011
publisher	Elsevier BV
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 Engineering and Applied Sciences - Sport and Exercise Sciences{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Engineering and Applied Sciences - Sport and Exercise Sciences
url	http://dx.doi.org/10.1016/j.jsams.2019.10.011
document_store_str	1
active_str	0
description	ObjectivesResearch has linked physiological (e.g., hormonal, affective, fatigue) outcomes to performance indicators in rugby competition, but no work has integrated and contextualised these factors within a test-match environment. We addressed this gap by monitoring 29 athletes from a training squad across eight international rugby matches.MethodsPre-match (8-9 am) measures of salivary testosterone and cortisol concentrations, sleep duration, pulse rate, muscle soreness, stress, mood, and motivation were taken. Contextual factors were playing time, internal training load (ITL), test-match experience, opponent ranking, and crowd size. Performance was indexed by coach and player ratings of performance (CRP, PRP) and quantitative metrics; offloads, turnovers, runs with ball in hand (RWB), tackles, passes, and defenders beaten (DFB).ResultsMorning cortisol, sleep and mood were positively related to CRP and PRP (standardised coefficient estimates from 0.17 to 0.22). Cortisol, sleep, stress, mood and motivation were associated with one (or more) of turnovers, RWB, tackles, passes and DFB (incidence rate ratio [IRR] from 0.74 to 1.40). Playing time was positively related to all quantitative performance indicators (IRR from 1.01 to 1.04) with ITL, opponent ranking, and crowd size predicting selected outputs (IRR from 0.89 to 1.15). The explanatory models varied (conditional R2 = 0.15 to 0.83) but were generally stronger with both physiological and contextual inputs.ConclusionsMultiple physiological and contextual factors appear to contribute to player performance in international rugby competition. Measurement of these factors may guide training and management practices, a potential practical consequence but also advancing understanding from marker to causal link.
published_date	2020-04-01T04:04:59Z
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score	11.036706

Performance indicators during international rugby union matches are influenced by a combination of physiological and contextual variables

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