Repeatability of a running heat tolerance test
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In: Journal of Thermal Biology, Vol. 49-50, 19.02.2015, p. 91-97.
Research output: Contribution to journal › Article › peer-review
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TY - JOUR
T1 - Repeatability of a running heat tolerance test
AU - Mee, J.A.
AU - Doust, J.
AU - Maxwell, N.S.
PY - 2015/2/19
Y1 - 2015/2/19
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) (30 min, 9 km h−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 beats min−1, RHTT2: 183±15 beats min−1, ICC=0.99, TEM=2 beats min−1), nor sweat rate (1721±675 g h−1, 1716±745 g h−1, ICC=0.95, TEM=162 g h−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) (30 min, 9 km h−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 beats min−1, RHTT2: 183±15 beats min−1, ICC=0.99, TEM=2 beats min−1), nor sweat rate (1721±675 g h−1, 1716±745 g h−1, ICC=0.95, TEM=162 g h−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.
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 -