Journal article
Game-to-Game Increases in Core Temperature During Rugby 7’s World Series Tournaments
Medicine and Science in Sports and Exercise, Vol.50(5S), pp.339-339
31/05/2018
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Abstract
Purpose: Characterize player core temperature (Tc) across two separate World Rugby 7’s Series (WRSS) tournaments in temperate and warm environments.
Methods: Continuous Tc (ingestible e-Celsius™ capsule) was collected in seventeen separate playing members of one men’s team (Singapore; n = 12, London; n = 11, with n = 6 competing in both tournaments) competing at the Singapore (warm) and London (temperate) WRSS tournaments. Symptoms of exertional heat illnesses (EHI), cooling strategy use, playing minutes and wet blub globe temperature (WBGT) were collected. Linear mixed models were used and a magnitude-based inference network was used to describe differences in delta Tc between all periods (baseline, pre-warm-up, warm-up, pre-game, game and post-game) within and between competitions.
Results: There were substantial game-to-game Tc increases relative to baseline, particularly within second and third games, on all match-days. Despite high peak Tc values (Singapore 39.9°C; London 39.6°C); (1) no signs and symptoms of EHI were reported by players; (2) voluntary post-game CWI usage was low; and (3) other pre-, during- and post-game cooling maneuverers were not implemented. Magnitude of Tc response was associated with playing minutes [excluding London Day 2 (Effect size; ES = 0.87–1.46)] and WBGT [excluding Singapore Day 1 (ES = 0.54–0.60)].
Conclusion: Tc demonstrated game-to-game increase with peak temperatures approaching thresholds associated with EHI (>40°C) and exceeding those demonstrated to decrement repeated sprint performance (>39°C), despite the short game duration. Practitioners may consider the use of acclimation/acclimatization programs (preferentially) and practice compatible cooling strategies to minimize Tc increase and maximize recovery and preparedness for games within and between match-days.
Details
- Title
- Game-to-Game Increases in Core Temperature During Rugby 7’s World Series Tournaments
- Creators
- Lee Taylor - Aspetar Orthopaedic and Sports Medicine HospitalHeidi Thornton - Newcastle Knights Rugby League Club, Newcastle, AustraliaNick Lumley - Scottish Rugby UnionChristopher Stevens - Southern Cross University
- Publication Details
- Medicine and Science in Sports and Exercise, Vol.50(5S), pp.339-339
- Publisher
- Lippincott Williams & Wilkins
- Grant note
- Supported by Aspire Zone Foundation (AZF; Doha, Qatar) funding.
- Identifiers
- 991012979169302368
- Copyright
- © 2018 American College of Sports Medicine
- Academic Unit
- Faculty of Health; School of Health and Human Sciences; Human Sciences
- Language
- English
- Resource Type
- Journal article