caa a22 4500 445367415 CHVBK 20180317142935.0 cr unu---uuuuu 170323e20110701xx s 000 0 eng 10.1007/s00484-010-0374-5 doi (NATIONALLICENCE)springer-10.1007/s00484-010-0374-5 Comparison of heat dissipation response between Malaysian and Japanese males during exercise in humid heat stress [Elektronische Daten] [Hitoshi Wakabayashi, Titis Wijayanto, Joo-Young Lee, Nobuko Hashiguchi, Mohamed Saat, Yutaka Tochihara] This study investigated the differences in heat dissipation response to intense heat stress during exercise in hot and humid environments between tropical and temperate indigenes with matched physical characteristics. Ten Japanese (JP) and ten Malaysian (MY) males participated in this study. Subjects performed exercise for 60min at 55% peak oxygen uptake in 32°C air with 70% relative humidity, followed by 30min recovery. The increase in rectal temperature (T re) was smaller in MY during exercise compared to JP. The local sweat rate and total body mass loss were similar in both groups. Both skin blood flow and mean skin temperature was lower in MY compared to JP. A significantly greater increase in hand skin temperature was observed in MY during exercise, which is attributable to heat loss due to the greater surface area to mass ratio and large number of arteriovenous anastomoses. Also, the smaller increase in T re in MY may be explained by the presence of a significantly greater core-skin temperature gradient in MY than JP. The thermal gradient is also a major factor in increasing the convective heat transfer from core to skin as well as skin blood flow. It is concluded that the greater core-skin temperature gradient observed in MY is responsible for the smaller increase in T re. ISB, 2010 Heat acclimatization nationallicence Core-skin temperature gradient nationallicence Core to skin heat transfer nationallicence Thermoregulation nationallicence Wakabayashi Hitoshi Department of Ergonomics, Faculty of Design, Kyushu University, 4-9-1, Shiobaru, Minami-ku, 815-8540, Fukuoka, Japan aut Wijayanto Titis Department of Ergonomics, Faculty of Design, Kyushu University, 4-9-1, Shiobaru, Minami-ku, 815-8540, Fukuoka, Japan aut Lee Joo-Young Department of Ergonomics, Faculty of Design, Kyushu University, 4-9-1, Shiobaru, Minami-ku, 815-8540, Fukuoka, Japan aut Hashiguchi Nobuko Department of Health Science, Faculty of Medicine, Kyushu University, Fukuoka, Japan aut Saat Mohamed School of Health Sciences, Universiti Sains Malaysia, Kelantan, Malaysia aut Tochihara Yutaka Department of Ergonomics, Faculty of Design, Kyushu University, 4-9-1, Shiobaru, Minami-ku, 815-8540, Fukuoka, Japan aut International Journal of Biometeorology Springer-Verlag 55/4(2011-07-01), 509-517 0020-7128 55:4<509 2011 55 484 https://doi.org/10.1007/s00484-010-0374-5 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s00484-010-0374-5 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Wakabayashi Hitoshi Department of Ergonomics, Faculty of Design, Kyushu University, 4-9-1, Shiobaru, Minami-ku, 815-8540, Fukuoka, Japan aut NATIONALLICENCE 700 1- Wijayanto Titis Department of Ergonomics, Faculty of Design, Kyushu University, 4-9-1, Shiobaru, Minami-ku, 815-8540, Fukuoka, Japan aut NATIONALLICENCE 700 1- Lee Joo-Young Department of Ergonomics, Faculty of Design, Kyushu University, 4-9-1, Shiobaru, Minami-ku, 815-8540, Fukuoka, Japan aut NATIONALLICENCE 700 1- Hashiguchi Nobuko Department of Health Science, Faculty of Medicine, Kyushu University, Fukuoka, Japan aut NATIONALLICENCE 700 1- Saat Mohamed School of Health Sciences, Universiti Sains Malaysia, Kelantan, Malaysia aut NATIONALLICENCE 700 1- Tochihara Yutaka Department of Ergonomics, Faculty of Design, Kyushu University, 4-9-1, Shiobaru, Minami-ku, 815-8540, Fukuoka, Japan aut NATIONALLICENCE 773 0- International Journal of Biometeorology Springer-Verlag 55/4(2011-07-01), 509-517 0020-7128 55:4<509 2011 55 484 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer