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https://hdl.handle.net/20.500.14094/90007818
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2024-04-25
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90007818 (fulltext)
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メタデータID
90007818
アクセス権
open access
出版タイプ
Accepted Manuscript
タイトル
The sweat glands' maximum ion reabsorption rates following heat acclimation in healthy older adults
著者
Gerrett, Nicola ; Amano, Tatsuro ; Inoue, Yoshimitsu ; Kondo, Narihiko
著者名
Gerrett, Nicola
著者名
Amano, Tatsuro
著者名
Inoue, Yoshimitsu
著者ID
A0541
研究者ID
1000070215458
KUID
https://kuid-rm-web.ofc.kobe-u.ac.jp/search/detail?systemId=f271f58d8a182b6d520e17560c007669
著者名
Kondo, Narihiko
近藤, 徳彦
コンドウ, ナリヒコ
所属機関名
人間発達環境学研究科
収録物名
Experimental Physiology
巻(号)
106(1)
ページ
302-315
出版者
Wiley
刊行日
2021-01-01
公開日
2022-02-01
抄録
New Findings What is the central question to this study? Do the sweat glands' maximum ion reabsorption rates increase following heat acclimation in healthy older individuals and is this associated with elevated aldosterone concentrations? What is the main finding and its importance? Sweat gland maximum ion reabsorption rates improved heterogeneously across body sites, which occurred without any changes in aldosterone concentration following a controlled hyperthermic heat acclimation protocol in healthy older individuals. Abstract We examined whether the eccrine sweat glands' ion reabsorption rates improved following heat acclimation (HA) in older individuals. Ten healthy older adults (>65 years) completed a controlled hyperthermic (+0.9°C rectal temperature, Tre) HA protocol for nine non-consecutive days. Participants completed a passive heat stress test (lower leg 42°C water submersion) pre-HA and post-HA to assess physiological regulation of sweat gland ion reabsorption at the chest, forearm and thigh. The maximum ion reabsorption rate was defined as the inflection point in the slope of the relation between galvanic skin conductance and sweat rate (SR). We explored the responses again after a 7-day decay. During passive heating, the Tb thresholds for sweat onset on the chest and forearm were lowered after HA (P < 0.05). However, sweat sensitivity (i.e. the slope), the SR at a given Tre and gross sweat loss did not improve after HA (P > 0.05). Any changes observed were lost during the decay. Pilocarpine-induced sudomotor responses to iontophoresis did not change after HA (P ≥ 0.801). Maximum ion reabsorption rate was only enhanced at the chest (P = 0.001) despite unaltered aldosterone concentration after HA. The data suggest that this adaptation is lost after 7 days? decay. The HA protocol employed in the present study induced partial adaptive sudomotor responses. Eccrine sweat gland ion reabsorption rates improved heterogeneously across the skin sites. It is likely that aldosterone secretion did not alter the chest sweat ion reabsorption rates observed in the older adults.
キーワード
adaptation
ageing
aldosterone
controlled hyperthermia
heat acclimation
passive heating
sweat
sweat gland adaptation
カテゴリ
人間発達環境学研究科
学術雑誌論文
権利
© 2020 The Authors. Experimental Physiology © 2020 The Physiological Society. This is the peer reviewed version of the following article: [Gerrett, N, Amano, T, Inoue, Y, Kondo, N. The sweat glands’ maximum ion reabsorption rates following heat acclimation in healthy older adults. Experimental Physiology. 2021; 106: 302-315], which has been published in final form at https://doi.org/10.1113/EP088486. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions. This article may not be enhanced, enriched or otherwise transformed into a derivative work, without express permission from Wiley or by statutory rights under applicable legislation. Copyright notices must not be removed, obscured or modified. The article must be linked to Wiley’s version of record on Wiley Online Library and any embedding, framing or otherwise making available the article or pages thereof by third parties from platforms, services and websites other than Wiley Online Library must be prohibited.
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資源タイプ
journal article
言語
English (英語)
ISSN
0958-0670
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eISSN
1469-445X
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NCID
AA10751559
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関連情報
DOI
https://doi.org/10.1113/EP088486
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