著者

塩澤 信良 目加田 優子 秋山 嘉子 林 かほり 森 佳子 和田 智史 上岡 洋晴 川野 因 Nobuyoshi SHIOZAWA MEKATA Yuko AKIYAMA Yoshiko HAYASHI Kaori MORI Keiko WADA Satoshi KAMIOKA Hiroharu KAWANO Yukari 東京農業大学大学院農学研究科食品栄養学 東京農業大学大学院農学研究科食品栄養学 東京農業大学大学院農学研究科食品栄養学 東京農業大学大学院農学研究科食品栄養学 東京農業大学大学院農学研究科食品栄養学 東京農業大学大学院農学研究科食品栄養学 東京農業大学地域環境科学部教養分野 東京農業大学応用生物科学部栄養科学科 Department of Food and Nutritional Science Graduate School of Agriculture Tokyo University of Agriculture Department of Food and Nutritional Science Graduate School of Agriculture Tokyo University of Agriculture Department of Food and Nutritional Science Graduate School of Agriculture Tokyo University of Agriculture Department of Food and Nutritional Science Graduate School of Agriculture Tokyo University of Agriculture Department of Food and Nutritional Science Graduate School of Agriculture Tokyo University of Agriculture Department of Food and Nutritional Science Graduate School of Agriculture Tokyo University of Agriculture Fundamental Arts and Sciences Faculty of Regional Environment Science Tokyo University of Agriculture Department of Nutritional Sciences Faculty of Applied Bio-Science Tokyo University of Agriculture

出版者

東京農業大学

雑誌

東京農業大学農学集報 (ISSN:03759202)

巻号頁・発行日

vol.51, no.4, pp.185-192,

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本研究は人工芒硝泉による足浴が自律神経活動に及ぼす影響について検討することを目的とした。健康な若年男女計6名(男性3名 : 20.7±0.6歳,女性3名 : 21.3±0.6歳)を対象に,人工芒硝泉浴,淡水浴,湯なし条件(対照座位)の足浴条件を1日1条件,ランダムな順序で施行した。対象者には20分間座位安静をとってもらい,引き続き足浴前値の測定を行った。足浴は座位にて41℃(33L)の温湯に両足膝下約10cmまで15分間浸漬して行った。足浴終了後は対象者自身が水分を拭き取り,両足を毛布で覆い,60分間座位安静を保った。その間,心拍数,心拍変動周波数に基づく自律神経活動,鼓膜温を測定するとともに,体感温度,眠気,疲労感などの主観的評価をVisual Analogue Scale(VAS)を用いて記録した。その結果,人工芒硝泉浴及び淡水浴により体感温度は有意に上昇したが,鼓膜温及び心拍数に有意な変動は見られなかった。また淡水浴後は交感神経活動の有意な亢進が認められたが,人工芒硝泉浴後はそれが見られなかった。本結果から人工芒硝泉による足浴は足浴後の交感神経活動の亢進を抑え,疲労感の低減に寄与する可能性が示唆された。This study was conducted to estimate the effect of a footbath with sodium sulfate (Na2SO4) on autonomic nervous system (ANS) activity. Each of three young healthy males (age, 20.7±0.6 years) and females (age, 21.3±0.6 years) participated in 3 conditions in random order, footbaths with or without Na2SO4, and a sitting position without water as a control. Each subject sat on a chair and kept quiet for 20min with heart rate (HR) stabilized, and subsequently basal measurements were conducted. In a sitting position, they dipped their calves 10cm under their knee joints into hot water (41℃, 33L) for 15min. Immediately after the bathing, they removed moisture, covered their knees with a blanket and sat for 60min thereafter. Counts of HR, ANS activity based on frequency of HR variability, and a core temperature using an eardrum thermometer were measured. The degree of thermal comfort such as relatively hot or relatively cool, sleepiness and fatigue were also estimated using visual analogue scales (VAS). As a result, both footbaths with and without Na2SO4 significantly increased the subjective thermal comfort, while the core temperature and HR counts were unaffected. Sympathetic nervous system (SNS) activity was significantly increased by the footbath without Na2SO4, but not with Na2SO4. These observations suggested that in the footbath, Na2SO4 might have an inhibitory effect on increased SNS activity, and induce some depressive effects on feeling of fatigue.