水循環スーツを着用した運動時の体温調節反応と冷却面積，冷却容量との関係

• 久米 雅

  京都工芸繊維大学伝統みらい研究センター 日本体育大学大学院

• 芳田 哲也

  京都工芸繊維大学大学院

• 常岡 秀行

  京都工芸繊維大学大学院

• 木村 直人

  日本体育大学大学院

• 伊藤 孝

  日本体育大学大学院

書誌事項

タイトル別名

• RELATIONSHIP BETWEEN BODY SURFACE COOLING AREA, COOLING CAPACITY, AND THERMOREGULATORY RESPONSES WEARING WATER PURFUSED SUITS DURING EXERCISE IN HUMANS
• ミズ ジュンカン スーツ オ チャクヨウシタ ウンドウジ ノ タイオン チョウセツ ハンノウ ト レイキャク メンセキ レイキャク ヨウリョウ トノ カンケイ

抄録

This study analyzed the effects of various body surface areas being cooled by water-perfused suits (WPS) on thermoregulatory response during exercise in a hot environment. Seven male subjects, dressed in clothing with low moisture permeability (rain coats) over WPS covering the whole body surface except for the face, hands, and feet, performed three sessions of 20-min cycling at low intensity (250w/m²) in a room maintained at 30℃ under six conditions of body surface cooling : whole body (WB), upper body (UB), lower body (LB), lower body except lower legs (LBEL), head and neck (HN), and no body cooling (NBC). The coolant temperature at the inlet was 20℃ for all conditions, and heat extraction (HE) was estimated by the difference between inlet and outlet water temperatures and water flow rate. Esophageal (Tes) and deep thigh temperatures (T-d.thigh) and heart rate (HR) during exercise were significantly (p＜0.01) higher for NBC and HN, and forearm skin blood flow (SkBF) and dehydration (DEH) were significantly (p＜0.01) lower for WB than for other conditions. There was a similar tendency concerning Tes and T-d.thigh among WB, LBEL, and LB ; however, T-d.thigh for UB was significantly (p＜0.01) higher than for WB, LBEL, and LB. In comparison with resting levels, the mean skin temperature (Tsk) and thermal sensation (TS) significantly (p＜0.01) increased for NBC and HN, and decreased for UB and WB, but remained constant for LBEL and LB during exercise. Under all conditions, increases in Tes (ΔTes) and T-d.thigh (ΔT-d.thigh) at the end of exercise were significantly (p＜0.01) increased when less than 40% of the body surface was cooled (Tsk : above 35.8℃, HE : less than 110W). Furthermore, ΔTes at the end of the exercise was related to ΔTsk×SkBF, while the slope of the regression line between those parameters was steeper when ΔTsk×SkBF values were negative, as opposed to positive values. These results suggest that during light exercise under different body surface cooling conditions : 1) UB leads to a high T-d.thigh while Tes, Tsk, and TS are as low as those for WB, 2) critical levels of body surface cooling area causing a decrease in core temperature elevation might exist, and 3) changes in blood circulation due to body cooling might be affecting temperature responses at the end of exercise.

収録刊行物

• 体力科学

  体力科学 58 (1), 109-122, 2009

  一般社団法人日本体力医学会

キーワード

• Skin blood flow
• Esophageal temperature
• Deep Thigh temperature

詳細情報

• CRID: 1390001204922780672
• NII論文ID: 110007127007
• NII書誌ID: AN00137986
• DOI: 10.7600/jspfsm.58.109
• ISSN: 18814751
• ISSN: 0039906X
• NDL書誌ID: 10174843
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I10174843
• Web Site: https://www.jstage.jst.go.jp/article/jspfsm/58/1/58_1_109/_pdf
• Web Site: https://search.jamas.or.jp/link/ui/2009215393
• 本文言語コード: ja
• データソース種別:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
  • KAKEN
• 抄録ライセンスフラグ: 使用不可