Changes in Core Temperature During an Elite Female Rugby Sevens Tournament.

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

Changes in Core Temperature During an Elite Female Rugby Sevens Tournament.

Henderson, MJ Chrismas, BCR Stevens, CJ Coutts, AJ Taylor, L

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Publisher:: HUMAN KINETICS PUBL INC
Publication Type:: Journal Article
Citation:: International journal of sports physiology and performance, 2020, 15, (4), pp. 571-580
Issue Date:: 2020-02-05

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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	Coutts, AJ
dc.contributor.author	Taylor, L
dc.date.accessioned	2020-08-06T01:27:01Z
dc.date.available	2019-07-29
dc.date.available	2020-08-06T01:27:01Z
dc.date.issued	2020-02-05
dc.identifier.citation	International journal of sports physiology and performance, 2020, 15, (4), pp. 571-580
dc.identifier.issn	1555-0265
dc.identifier.issn	1555-0273
dc.identifier.uri	http://hdl.handle.net/10453/141982
dc.description.abstract	PURPOSE:To characterize player core temperature (Tc) across a World Rugby Women's Sevens Series tournament day (WRWSS) and determine the efficacy of commonly employed cold-water-immersion (CWI) protocols. METHODS:Tc was measured in 12 elite female rugby sevens athletes across 3 games (G1-3) from day 1 of the Sydney WRWSS tournament. Symptoms of exertional heat illness, perceptual scales, CWI details, playing minutes, external-load data (measured by global positioning systems), and wet-bulb globe temperature (range 18.5°C-20.1°C) were also collected. Linear mixed models and magnitude-based inferences were used to assess differences in Tc between periods (G1-3 and warm-ups [WU]). RESULTS:Average Tc was "very likely" lower (effect size; ±90% confidence limit -0.33; ±0.18) in G1 than in G2. Peak Tc was "very likely" (0.71; ±0.28) associated with increased playing time. CWI did not remove the accumulated Tc due to WU and match-play activity (∼1°C-2°C rise in Tc still present compared with Tc at WU onset for players ≥6-min match play). CONCLUSIONS:Elite WRWSS athletes experienced high Tc during WU (Tc peak 37.9-39.0°C) and matches (Tc peak 37.9-39.8°C), a magnitude known to reduce intermittent high-intensity physical performance (≥39°C). The CWI protocol resulted in players (≥6-min match play) with ∼1°C to 2°C raised Tc compared with Tc at WU onset.
dc.format	Print-Electronic
dc.language	eng
dc.publisher	HUMAN KINETICS PUBL INC
dc.relation.ispartof	International journal of sports physiology and performance
dc.relation.isbasedon	10.1123/ijspp.2019-0375
dc.rights	info:eu-repo/semantics/restrictedAccess
dc.subject	1106 Human Movement and Sports Sciences, 1116 Medical Physiology, 1701 Psychology
dc.subject.classification	Sport Sciences
dc.title	Changes in Core Temperature During an Elite Female Rugby Sevens Tournament.
dc.type	Journal Article
utslib.citation.volume	15
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/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
utslib.copyright.status	closed_access	*
pubs.consider-herdc	false
dc.date.updated	2020-08-06T01:26:55Z
pubs.issue	4
pubs.publication-status	Published
pubs.volume	15
utslib.citation.issue	4

Abstract:

PURPOSE:To characterize player core temperature (Tc) across a World Rugby Women's Sevens Series tournament day (WRWSS) and determine the efficacy of commonly employed cold-water-immersion (CWI) protocols. METHODS:Tc was measured in 12 elite female rugby sevens athletes across 3 games (G1-3) from day 1 of the Sydney WRWSS tournament. Symptoms of exertional heat illness, perceptual scales, CWI details, playing minutes, external-load data (measured by global positioning systems), and wet-bulb globe temperature (range 18.5°C-20.1°C) were also collected. Linear mixed models and magnitude-based inferences were used to assess differences in Tc between periods (G1-3 and warm-ups [WU]). RESULTS:Average Tc was "very likely" lower (effect size; ±90% confidence limit -0.33; ±0.18) in G1 than in G2. Peak Tc was "very likely" (0.71; ±0.28) associated with increased playing time. CWI did not remove the accumulated Tc due to WU and match-play activity (∼1°C-2°C rise in Tc still present compared with Tc at WU onset for players ≥6-min match play). CONCLUSIONS:Elite WRWSS athletes experienced high Tc during WU (Tc peak 37.9-39.0°C) and matches (Tc peak 37.9-39.8°C), a magnitude known to reduce intermittent high-intensity physical performance (≥39°C). The CWI protocol resulted in players (≥6-min match play) with ∼1°C to 2°C raised Tc compared with Tc at WU onset.

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http://hdl.handle.net/10453/141982