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A comparison of males and females' temporal patterning to short- and long-term heat acclimation

Mee, J.A. and Gibson, O.R. and Doust, J. and Maxwell, N.S. (2015) A comparison of males and females' temporal patterning to short- and long-term heat acclimation. Scandinavian Journal of Medicine & Science in Sports, 25 (Suppl.). pp. 250-258. DOI: 10.1111/sms.12417

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Abstract

The current study assessed sex differences in thermoregulatory and physiological adaptation to short-term (STHA) and long-term heat acclimation (LTHA). Sixteen (eight males; eight females) participants performed three running heat tolerance tests (RHTT), preceding HA (RHTT1), following 5 days HA (RHTT2) and 10 days HA (RHTT3). The RHTT involved 30-min running (9�km/h, 2% gradient) in 40�°C, 40% relative humidity. Following STHA, resting rectal temperature (Trrest) (males: �0.24�±�0.16�°C, P���0.001; females: �0.02�±�0.08�°C, P�=�0.597), peak rectal temperature (Trpeak) (males: �0.39�±�0.36�°C, P���0.001; females �0.07�±�0.18�°C, P�=�0.504), and peak heart rate (males: �14�±�12 beats/min, P���0.001; females: �5�±�3 beats/min, P�=�0.164) reduced in males, but not females. Following STHA, sweat rate relative to body surface area (SRBSA) increased (428�±�269�g/h/m2, P�=�0.029) in females, but not males (�11�±�286�g/h/m2, P�=�0.029). Following LTHA, Trrest (males: �0.04�±�0.15�°C, P�=�0.459; females: �0.22�±�0.12�°C, P���0.01) and Trpeak (males: �0.05�±�0.26�°C, P�=�0.590; females: �0.41�±�0.24�°C, P���0.01) reduced in females, but not males. Following LTHA, SRBSA increased in males (308�±�346�g/h/m2, P�=�0.029), but not females (44�±�373�g/h/m2, P�=�0.733). Males and females responded to STHA; however, females required LTHA to establish thermoregulatory and cardiovascular stability. HA protocols should be designed to target sex differences in thermoregulation for optimal adaptation.

Item Type: Article
Subjects: Research Publications
Departments: College of Health and Behavioural Sciences > School of Sport, Health and Exercise Sciences
Date Deposited: 22 Mar 2016 03:35
Last Modified: 22 Mar 2016 03:35
ISSN: 0905-7188
URI: http://e.bangor.ac.uk/id/eprint/6394
Identification Number: DOI: 10.1111/sms.12417
Publisher: Wiley
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