Thermoregulatory and cardiovascular responses in the elderly towards a broad range of gradual air temperature changes

Tochihara, Yutaka; Yamashita, Kazuaki; Fujii, Kenji; Kaji, Yumi; Wakabayashi, Hitoshi; Kitahara, Hiroyuki

Thermoregulatory and cardiovascular responses in the elderly towards a broad range of gradual air temperature changes

Tochihara, Yutaka; Yamashita, Kazuaki; Fujii, Kenji et al.

Journal of thermal biology, 2021, 99, 103007

Permalink : https://hdl.handle.net/2115/85468

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アクセス権	open access
URI	https://hdl.handle.net/2115/85468
タイトル	Thermoregulatory and cardiovascular responses in the elderly towards a broad range of gradual air temperature changes
著者	Tochihara, Yutaka ; Yamashita, Kazuaki ; Fujii, Kenji ; Kaji, Yumi ; Wakabayashi, Hitoshi ; Kitahara, Hiroyuki
著者名 Tochihara, Yutaka
著者名 Yamashita, Kazuaki
著者名 Fujii, Kenji
著者名 Kaji, Yumi
著者名 Wakabayashi, Hitoshi
著者名 Kitahara, Hiroyuki
言語	英語
キーワード	Elderly
	Ambient temperature change
	Blood pressure
	Cutaneous vascular conductance
	Rectal temperature
	Skin temperature
発行日	2021-07
出版者	Elsevier
収録物名	Journal of thermal biology
巻(号)	99
ページ	103007
抄録	This study aimed to determine age-related differences in thermoregulatory and cardiovascular responses to a wide range of gradual ambient temperature (T-a) changes. Morphologically matched normotensive elderly and young males participated. The participants wearing only shorts rested during the 3-h experiment. After 30 min of baseline at 28 degrees C, T-a increased linearly to 43 degrees C in 30 min (warming) and then gradually decreased to 13 degrees C in 60 min (cooling). T-a was rewarmed to 28 degrees C in 30 min (rewarming), and that temperature was maintained for an additional 30 min (second baseline). During the warming phase, there were no age-related differences in blood pressure (BP) and rectal temperature (T-re), despite a significantly lower cutaneous vascular conductance and heart rate in the elderly (P < 0.05). At the end of the cooling phase, systolic blood pressure (SBP) in the elderly was significantly higher than the young (155.8 +/- 16.1 and 125.0 +/- 12.5 mmHg, P < 0.01). There was a consistent age group difference in SBP during rewarming. Mean skin temperature was significantly lower in the elderly during rewarming (P < 0.05). T-re decreased more in the elderly and was significantly lower at the end of the experiment than the younger participants (36.78 +/- 0.34 and 37.01 +/- 0.15 degrees C, P < 0.05). However, there were no age group differences in thermal sensation. In conclusion, even normotensive elderly participants have a greater and more persistent BP response to cold than younger adults, suggesting that the elderly might be at a higher risk of cardiac events during cooling and subsequent rewarming.
資源タイプ	学術雑誌論文
出版タイプ	Accepted Manuscript
権利情報	Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International
権利情報	© <2021>. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/
PISSN	0306-4565
関連情報 (isVersionOf)	出版社版DOI https://doi.org/10.1016/j.jtherbio.2021.103007