Repeatability of a running heat tolerance test

Research output: Contribution to journalArticleResearchpeer-review

Abstract

At present there is no standardised heat tolerance test (HTT) procedure adopting a running mode of exercise. Current HTTs may misdiagnose a runner's susceptibility to a hyperthermic state due to differences in exercise intensity. The current study aimed to establish the repeatability of a practical running test to evaluate individual's ability to tolerate exercise heat stress. Sixteen (8M, 8F) participants performed the running HTT (RHTT) (30min, 9kmh−1, 2% elevation) on two separate occasions in a hot environment (40°C and 40% relative humidity). There were no differences in peak rectal temperature (RHTT1: 38.82±0.47°C, RHTT2: 38.86±0.49°C, Intra-class correlation coefficient (ICC)=0.93, typical error of measure (TEM)=0.13°C), peak skin temperature (RHTT1: 38.12±0.45, RHTT2: 38.11±0.45°C, ICC=0.79, TEM=0.30°C), peak heart rate (RHTT1: 182±15 beatsmin−1, RHTT2: 183±15 beatsmin−1, ICC=0.99, TEM=2 beatsmin−1), nor sweat rate (1721±675gh−1, 1716±745gh−1, ICC=0.95, TEM=162gh−1) between RHTT1 and RHTT2 (p>0.05). Results demonstrate good agreement, strong correlations and small differences between repeated trials, and the TEM values suggest low within-participant variability. The RHTT was effective in differentiating between individuals physiological responses; supporting a heat tolerance continuum. The findings suggest the RHTT is a repeatable measure of physiological strain in the heat and may be used to assess the effectiveness of acute and chronic heat alleviating procedures.
Original languageEnglish
Pages (from-to)91-97
Number of pages7
JournalJournal of Thermal Biology
Volume49-50
DOIs
Publication statusPublished - 1 Apr 2015

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Hot Temperature
Skin Temperature
Sweat
Humidity
Diagnostic Errors
Heart Rate
Temperature
Thermotolerance

Keywords

  • Heat tolerance
  • Continuum
  • Reliability
  • Thermoregulatory strain
  • Heat illness

Cite this

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title = "Repeatability of a running heat tolerance test",
abstract = "At present there is no standardised heat tolerance test (HTT) procedure adopting a running mode of exercise. Current HTTs may misdiagnose a runner's susceptibility to a hyperthermic state due to differences in exercise intensity. The current study aimed to establish the repeatability of a practical running test to evaluate individual's ability to tolerate exercise heat stress. Sixteen (8M, 8F) participants performed the running HTT (RHTT) (30min, 9kmh−1, 2{\%} elevation) on two separate occasions in a hot environment (40°C and 40{\%} relative humidity). There were no differences in peak rectal temperature (RHTT1: 38.82±0.47°C, RHTT2: 38.86±0.49°C, Intra-class correlation coefficient (ICC)=0.93, typical error of measure (TEM)=0.13°C), peak skin temperature (RHTT1: 38.12±0.45, RHTT2: 38.11±0.45°C, ICC=0.79, TEM=0.30°C), peak heart rate (RHTT1: 182±15 beatsmin−1, RHTT2: 183±15 beatsmin−1, ICC=0.99, TEM=2 beatsmin−1), nor sweat rate (1721±675gh−1, 1716±745gh−1, ICC=0.95, TEM=162gh−1) between RHTT1 and RHTT2 (p>0.05). Results demonstrate good agreement, strong correlations and small differences between repeated trials, and the TEM values suggest low within-participant variability. The RHTT was effective in differentiating between individuals physiological responses; supporting a heat tolerance continuum. The findings suggest the RHTT is a repeatable measure of physiological strain in the heat and may be used to assess the effectiveness of acute and chronic heat alleviating procedures.",
keywords = "Heat tolerance, Continuum, Reliability, Thermoregulatory strain, Heat illness",
author = "Jessica Mee and Jonathan Doust and Neil Maxwell",
year = "2015",
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Repeatability of a running heat tolerance test. / Mee, Jessica; Doust, Jonathan; Maxwell, Neil.

In: Journal of Thermal Biology, Vol. 49-50, 01.04.2015, p. 91-97.

Research output: Contribution to journalArticleResearchpeer-review

TY - JOUR

T1 - Repeatability of a running heat tolerance test

AU - Mee, Jessica

AU - Doust, Jonathan

AU - Maxwell, Neil

PY - 2015/4/1

Y1 - 2015/4/1

N2 - At present there is no standardised heat tolerance test (HTT) procedure adopting a running mode of exercise. Current HTTs may misdiagnose a runner's susceptibility to a hyperthermic state due to differences in exercise intensity. The current study aimed to establish the repeatability of a practical running test to evaluate individual's ability to tolerate exercise heat stress. Sixteen (8M, 8F) participants performed the running HTT (RHTT) (30min, 9kmh−1, 2% elevation) on two separate occasions in a hot environment (40°C and 40% relative humidity). There were no differences in peak rectal temperature (RHTT1: 38.82±0.47°C, RHTT2: 38.86±0.49°C, Intra-class correlation coefficient (ICC)=0.93, typical error of measure (TEM)=0.13°C), peak skin temperature (RHTT1: 38.12±0.45, RHTT2: 38.11±0.45°C, ICC=0.79, TEM=0.30°C), peak heart rate (RHTT1: 182±15 beatsmin−1, RHTT2: 183±15 beatsmin−1, ICC=0.99, TEM=2 beatsmin−1), nor sweat rate (1721±675gh−1, 1716±745gh−1, ICC=0.95, TEM=162gh−1) between RHTT1 and RHTT2 (p>0.05). Results demonstrate good agreement, strong correlations and small differences between repeated trials, and the TEM values suggest low within-participant variability. The RHTT was effective in differentiating between individuals physiological responses; supporting a heat tolerance continuum. The findings suggest the RHTT is a repeatable measure of physiological strain in the heat and may be used to assess the effectiveness of acute and chronic heat alleviating procedures.

AB - At present there is no standardised heat tolerance test (HTT) procedure adopting a running mode of exercise. Current HTTs may misdiagnose a runner's susceptibility to a hyperthermic state due to differences in exercise intensity. The current study aimed to establish the repeatability of a practical running test to evaluate individual's ability to tolerate exercise heat stress. Sixteen (8M, 8F) participants performed the running HTT (RHTT) (30min, 9kmh−1, 2% elevation) on two separate occasions in a hot environment (40°C and 40% relative humidity). There were no differences in peak rectal temperature (RHTT1: 38.82±0.47°C, RHTT2: 38.86±0.49°C, Intra-class correlation coefficient (ICC)=0.93, typical error of measure (TEM)=0.13°C), peak skin temperature (RHTT1: 38.12±0.45, RHTT2: 38.11±0.45°C, ICC=0.79, TEM=0.30°C), peak heart rate (RHTT1: 182±15 beatsmin−1, RHTT2: 183±15 beatsmin−1, ICC=0.99, TEM=2 beatsmin−1), nor sweat rate (1721±675gh−1, 1716±745gh−1, ICC=0.95, TEM=162gh−1) between RHTT1 and RHTT2 (p>0.05). Results demonstrate good agreement, strong correlations and small differences between repeated trials, and the TEM values suggest low within-participant variability. The RHTT was effective in differentiating between individuals physiological responses; supporting a heat tolerance continuum. The findings suggest the RHTT is a repeatable measure of physiological strain in the heat and may be used to assess the effectiveness of acute and chronic heat alleviating procedures.

KW - Heat tolerance

KW - Continuum

KW - Reliability

KW - Thermoregulatory strain

KW - Heat illness

U2 - 10.1016/j.jtherbio.2015.02.010

DO - 10.1016/j.jtherbio.2015.02.010

M3 - Article

VL - 49-50

SP - 91

EP - 97

JO - Journal of Thermal Biology

JF - Journal of Thermal Biology

SN - 0306-4565

ER -