Limiting Rise in Heat Load With an Ice Vest During Elite Female Rugby Sevens Warm-Ups.

Henderson, MJ; Chrismas, BCR; Stevens, CJ; Fransen, J; Coutts, AJ; Taylor, L

Limiting Rise in Heat Load With an Ice Vest During Elite Female Rugby Sevens Warm-Ups.

Henderson, MJ Chrismas, BCR Stevens, CJ Fransen, J

Coutts, AJ Taylor, L

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Publisher:: Human Kinetics
Publication Type:: Journal Article
Citation:: International Journal of Sports Physiology and Performance, 2021, 16, (11), pp. 1684-1691
Issue Date:: 2021-05-21

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Field	Value	Language
dc.contributor.author	Henderson, MJ
dc.contributor.author	Chrismas, BCR
dc.contributor.author	Stevens, CJ
dc.contributor.author	Fransen, J https://orcid.org/0000-0003-3355-1848
dc.contributor.author	Coutts, AJ
dc.contributor.author	Taylor, L
dc.date.accessioned	2022-01-04T02:54:36Z
dc.date.available	2021-01-25
dc.date.available	2022-01-04T02:54:36Z
dc.date.issued	2021-05-21
dc.identifier.citation	International Journal of Sports Physiology and Performance, 2021, 16, (11), pp. 1684-1691
dc.identifier.issn	1555-0265
dc.identifier.issn	1555-0273
dc.identifier.uri	http://hdl.handle.net/10453/152644
dc.description.abstract	Purpose: To determine the effect of wearing a phase-change cooling vest in elite female rugby sevens athletes during (1) a simulated match-day warm-up in hot conditions prior to a training session and (2) a prematch warm-up during a tournament in cool conditions. Methods: This study consisted of 2 randomized independent group designs (separated by 16 d) where athletes completed the same 23- to 25-minute match-day warm-up (1) in hot conditions (range = 28.0°C to 35.1°C wet bulb globe temperature [WBGT]) prior to training and (2) in cool conditions (range = 18.8°C to 20.1°C WBGT) prior to a World Rugby Women's Sevens Series match. In both conditions, athletes were randomly assigned to wearing either (1) the standardized training/playing ensemble (synthetic rugby shorts and training tee/jersey) or (2) the standardized training/playing ensemble plus a commercial phase-change athletic cooling vest. Group-wise differences in core temperature rise from baseline, global positioning system–measured external locomotive output, and perceptual thermal load were compared. Results: Core temperature rise during a match warm-up was lower in the hot condition only (−0.65°C [95% confidence interval = −1.22°C to −0.08°C], η p 2 =.23 [95% confidence interval =.00 to.51], P =.028). No differences in various external-load variables were observed. Conclusions: Phase-change cooling vests can be worn by athletes prior to, and during, a prematch warm-up in hot conditions to limit excess core temperature rise without adverse effects on thermal perceptions or external locomotion output.
dc.format	Print-Electronic
dc.language	eng
dc.publisher	Human Kinetics
dc.relation	Australian Rugby Union
dc.relation.ispartof	International Journal of Sports Physiology and Performance
dc.relation.isbasedon	10.1123/ijspp.2020-0833
dc.rights	info:eu-repo/semantics/closedAccess
dc.subject	1106 Human Movement and Sports Sciences, 1116 Medical Physiology, 1701 Psychology
dc.subject.classification	Sport Sciences
dc.title	Limiting Rise in Heat Load With an Ice Vest During Elite Female Rugby Sevens Warm-Ups.
dc.type	Journal Article
utslib.citation.volume	16
utslib.location.activity	United States
utslib.for	1106 Human Movement and Sports Sciences
utslib.for	1116 Medical Physiology
utslib.for	1701 Psychology
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Health
pubs.organisational-group	/University of Technology Sydney/Strength - CHSP - Health Services and Practice
pubs.organisational-group	/University of Technology Sydney/Strength - CHT - Health Technologies
pubs.organisational-group	/University of Technology Sydney/Centre for Health Technologies (CHT)
utslib.copyright.status	closed_access	*
pubs.consider-herdc	false
dc.date.updated	2022-01-04T02:54:35Z
pubs.issue	11
pubs.publication-status	Published
pubs.volume	16
utslib.citation.issue	11

Abstract:

Purpose: To determine the effect of wearing a phase-change cooling vest in elite female rugby sevens athletes during (1) a simulated match-day warm-up in hot conditions prior to a training session and (2) a prematch warm-up during a tournament in cool conditions. Methods: This study consisted of 2 randomized independent group designs (separated by 16 d) where athletes completed the same 23- to 25-minute match-day warm-up (1) in hot conditions (range = 28.0°C to 35.1°C wet bulb globe temperature [WBGT]) prior to training and (2) in cool conditions (range = 18.8°C to 20.1°C WBGT) prior to a World Rugby Women's Sevens Series match. In both conditions, athletes were randomly assigned to wearing either (1) the standardized training/playing ensemble (synthetic rugby shorts and training tee/jersey) or (2) the standardized training/playing ensemble plus a commercial phase-change athletic cooling vest. Group-wise differences in core temperature rise from baseline, global positioning system–measured external locomotive output, and perceptual thermal load were compared. Results: Core temperature rise during a match warm-up was lower in the hot condition only (−0.65°C [95% confidence interval = −1.22°C to −0.08°C], η p 2 =.23 [95% confidence interval =.00 to.51], P =.028). No differences in various external-load variables were observed. Conclusions: Phase-change cooling vests can be worn by athletes prior to, and during, a prematch warm-up in hot conditions to limit excess core temperature rise without adverse effects on thermal perceptions or external locomotion output.

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http://hdl.handle.net/10453/152644