Journal of Sports Science and Medicine
Journal of Sports Science and Medicine
ISSN: 1303 - 2968   
Ios-APP Journal of Sports Science and Medicine
Androit-APP Journal of Sports Science and Medicine
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©Journal of Sports Science and Medicine (2009) 08, 689 - 695

Research article
The Reliability of Adolescent Thermoregulatory Responses During a Heat Acclimation Protocol
Caroline S. Brokenshire, Neil Armstrong, Craig A. Williams 
Author Information
Children’s Health and Exercise Research Centre, School of Sport and Health Sciences, University of Exeter, UK

Craig A. Williams
✉ Children’s Health and Exercise Research Centre, School of Sport & Health Sciences, University of Exeter, St Luke’s Campus, Heavitree Road, EX1 2LU, UK
Email: c.a.williams@exeter.ac.uk
Publish Date
Received: 27-01-2009
Accepted: 29-10-2009
Published (online): 01-12-2009
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ABSTRACT

This study investigated the between trial variation of thermoregulatory measures during a heat acclimation protocol. Eight 14-16 y old boys completed three bouts of 20-min cycling at 45 % peak VO2 in a hot environment (35.1 ± 1.2 °C and 46. 4 ± 1.0 % relative humidity) on two occasions separated by a minimum of 24 h. Reliability was assessed through analysis of within-subject variation, the change in the mean, and retest correlation for measurements of aural temperature (Tau), mean skin temperature (Tsk), heart rate (HR) and oxygen uptake (VO2). Between trial differences were low for Tau, Tskbout1, Tskbout2and3 and HR with coefficients of variation 0.6 %, 1.5 %, 0.5 % and 4.0 %, respectively. The results demonstrate good reliability that will allow future investigators to precisely determine the extent of heat acclimation protocols in relation to the measurement error.

Key words: Reliability, heat acclimation, aural temperature, mean skin temperature


           Key Points
  • To allow paediatric heat acclimation guidelines to be produced, the extent of heat acclimation needs to be established once biological and mechanical variation has been accounted for.
  • The results of the present study indicate that between trial differences were low for aural temperature, mean skin temperature and heart rate with coefficient of variation values ranging from 0.6 - 4.0 %.
  • Future investigators will be able to utilise the coefficient of variation values to establish the effectiveness of heat acclimation with precision alongside the selection of appropriate sample size.
 
 
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