Effects of duration of stay in temperate area on thermoregulatory responses to passive heat exposure in tropical south-east Asian males residing in Japan.
Effects of duration of stay in temperate area on thermoregulatory responses to passive heat exposure in tropical south-east Asian males residing in Japan.
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在温带地区停留的时间对居住在日本的热带东南亚男性对被动热暴露的体温调节反应的影响。
DOI：
10.1186/1880-6805-31-25
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发表时间：
2012-09-13
影响因子：
3.1
通讯作者：
Tochihara Y
中科院分区：
文献类型：
--
作者：
Wijayanto T;Toramoto S;Wakabayashi H;Tochihara Y
在本研究中，我们调查了在温带地区停留的时间对热带地区居民被动热暴露的体温调节反应的影响，特别是为了阐明他们是否会通过居住在日本温带国家而失去被动热暴露期间的耐热性。我们招募了来自东南亚国家的12名男性(平均 ± SE年龄25.7 ± 1.3 )和12名日本男性(平均年龄24.1 ± 0.9 )，他们在日本居住的平均时间为24.5年± 5.04 。在空气温度28℃、相对湿度50%的条件下，腿部浸泡热水(42℃)60 ，诱导被动热暴露。与日本组相比，热带组暴露前直肠温度升高(P <； 0.0 1)，浸腿60 分钟内直肠温度升高幅度较小(P = 0.0 3)。此外，热带组的总出汗率(P = 0.0 6)和额部局部出汗率(P = 0.0 7)有降低的趋势。与日本组相比，热带组上背部开始出汗的时间也显著延长(P = 0.04)。在日本停留23个 月的热带组比在日本停留11个月 <； 的前额和背部出汗早(前额和背部分别为P <； 0.01和P = 0.03)。在日本停留时间与总出汗率呈正相关(r = 0.5 8，P<；0.0 5)，与前额出汗时间(r = −0.73，P = 0.0 1)和背部出汗时间(r = −0.6 6，P = 0.0 2)呈负相关。在这项研究中测量的其他生理指标没有显示出热带组中在日本生活时间较短的受试者与在那里生活较长时间的受试者之间的任何差异。我们的结论是，长期热习服获得的对被动热暴露的出汗反应的热习服性质会因停留在温带地区而衰退，正如我们热带小组的受试者所表明的那样。我们没有发现任何其他生理指标衰退的证据，这表明长期热习服获得的耐热性并不是通过在温带地区居住4 年以下而完全减弱的，尽管这种耐热性的某些方面可能会衰退。
In this study, we investigated the effects of duration of stay in a temperate area on the thermoregulatory responses to passive heat exposure of residents from tropical areas, particularly to clarify whether they would lose their heat tolerance during passive heat exposure through residence in a temperate country, Japan. We enrolled 12 males (mean ± SE age 25.7 ± 1.3 years) from south-east Asian countries who had resided in Japan for a mean of 24.5 ± 5.04 months, and 12 Japanese males (age 24.1 ± 0.9 years). Passive heat exposure was induced through leg immersion in hot water (42°C) for 60 minutes under conditions of 28°C air temperature and 50% relative humidity. Compared with the Japanese group, the tropical group displayed a higher pre-exposure rectal temperature (P < 0.01) and a smaller increase in rectal temperature during 60 minutes of leg immersion (P = 0.03). Additionally, the tropical group showed a tendency towards a lower total sweat rate (P = 0.06) and lower local sweat rate on the forehead (P = 0.07). The tropical group also had a significantly longer sweating onset time on the upper back (P = 0.04) compared with the Japanese groups. The tropical group who stayed in Japan for > 23 months sweated earlier on the forehead and upper back than those who stayed in Japan < 11 months (P < 0.01 and P = 0.03 for the forehead and upper back, respectively). There was a positive correlation between duration of stay in Japan and total sweat rate (r = 0.58, P <0.05), and negative correlations between duration of stay and sweating onset time on the forehead (r = −0.73, P = 0.01) and on the upper back (r = −0.66, P = 0.02). Other physiological indices measured in this study did not show any difference between the subjects in the tropical group who had lived in Japan for a shorter time and those who had lived there for a longer time. We conclude that the nature of heat acclimatization of the sweating responses to passive heat exposure that are acquired from long-term heat acclimatization is decayed by a stay in a temperate area, as shown by the subjects in our tropical group. We did not find any evidence of a decay in the other physiological indices, indicating that heat tolerance acquired from long-term heat acclimatization is not completely diminished through residence in a temperate area for less than 4 years, although some aspects of this heat tolerance may be decayed.
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影响因子：
3.2
作者：
IHZUKA, H;HORI, S;AKAMATSU, T
通讯作者：
AKAMATSU, T
DOI：
10.1007/bf00601802
发表时间：
1995-01-01
期刊：
EUROPEAN JOURNAL OF APPLIED PHYSIOLOGY AND OCCUPATIONAL PHYSIOLOGY
影响因子：
--
作者：
INOUE, Y;NAKAO, M;ARAKI, T
通讯作者：
ARAKI, T
影响因子：
2.7
作者：
KATSUURA, T;TACHIBANA, ME;KIKUCHI, Y
通讯作者：
KIKUCHI, Y
DOI：
10.2114/jpa.21.59
发表时间：
2002-01-01
期刊：
Journal of Physiological Anthropology and Applied Human Science
影响因子：
--
作者：
Nguyen, MyHang;Tokura, Hiromi
通讯作者：
Tokura, Hiromi
影响因子：
3.3
作者：
GIVONI, B;GOLDMAN, RF
通讯作者：
GOLDMAN, RF