Physiological responses during submaximal exercise in hot environments with identical WBGT in Indonesian and Japanese males  

Oleh:

Wijayanto, Titis ; Son, Su Young ; Umezaki, Sonomi ; Yasukouchi, Akira ; Tochihara, Yutaka

Jenis: Article from Proceeding
Dalam koleksi: Prosiding Seminar Nasional Teknik Industri Badan Kerjasama Penyelenggara Pendidikan Tinggi Teknik Industri (BKSTI) 2014: Bukittinggi, 2-4 September 2014, page 1: 126-129.
Topik: Physiological responses; Heat acclimatization; Warm-humid environment; Hot-dry environment; Identical WBGT
Fulltext: 22. bksti7-130 (Titis Wijayanto, Su-Young Son, Sonomi Umezaki, Akira Yasukouchi) 126-129.pdf (270.87KB)

Isi artikel

This study compared the effect of two environments with identical WBGT on physiological responses during submaximal exercise between Indonesians (tropical natives) and Japanese (temperate natives). Nine Indonesians (ID) and nine Japanese (JP) males performed exercise for 60 min at 55% peak oxygen uptake followed by a 30-min recovery in two environment conditions: warm humid (WH, Tair=31°C and 75% relative humidity (RH), WBGT=30°C) and hot dry (DH, Tair=38°C and 30% RH, WBGT=30°C). Both ID and JP groups displayed no significant differences in rectal temperature (Tre) between WH and DH conditions. ID group showed a smaller increase of Tre(?Tre) after 60-min of exercise in WH condition than JP group (P<0.1), whereas no difference in ?Trebetween ID and JP was observed in DH condition. JP group showed greater amount of total sweat loss (Msw)during exercise in DH condition than that in WH condition (P<0.1), while no difference was observed in ID group. Group comparison revealed no significant differences in Msw between ID and JP in any environment conditions.From the above results, the tropical indigenes from Indonesia showed a superior heat tolerance during exercise in WH condition than those from Japan, but not in DH condition

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