2 0 0 0 OA 低温でも発症する運動時熱中症
- 著者
- 新矢 博美 花輪 啓一 芳田 哲也 寄本 明 中井 誠一
- 出版者
- 一般社団法人日本体力医学会
- 雑誌
- 体力科学 (ISSN:0039906X)
- 巻号頁・発行日
- vol.63, no.1, pp.95-95, 2014 (Released:2014-01-24)
- 参考文献数
- 1
- 著者
- 中井 誠一 新矢 博美 芳田 哲也 寄本 明 井上 芳光 森本 武利
- 出版者
- 一般社団法人日本体力医学会
- 雑誌
- 体力科学 (ISSN:0039906X)
- 巻号頁・発行日
- vol.56, no.4, pp.437-444, 2007-08-01 (Released:2007-09-14)
- 参考文献数
- 40
- 被引用文献数
- 11 14
The guidelines for the prevention of heat disorders during sports activities were established 13 years ago in Japan. Since then, various studies on preventive measures against heat disorders have been done, yielding new knowledge about its prevention. It has been reported that the incidence of heat disorders is high in children and the elderly, and heat acclimatization and clothing are the factors involved in this disorder. We proposed to lower the WBGT (wet-bulb globe temperature) limit for warning (discontinuation of hard exercise) from “28°C or more” to “25°C or more” (corresponding to an ambient temperature of 28°C) for non-acclimatized persons, children, the elderly, and persons wearing clothes covering the entire body. We also indicated that heat disorders can occur due to unpredictable causes, because the mechanism is very complicated.
1 0 0 0 2010年の都道府県別熱中症死亡数と救急搬送数
1 0 0 0 OA 高温下運動時の体温調節反応に及ぼすフェンシングユニフォームの影響
- 著者
- 新矢 博美 芳田 哲也 高橋 英一 常岡 秀行 中井 誠一
- 出版者
- The Japanese Society of Physical Fitness and Sports Medicine
- 雑誌
- 体力科学 (ISSN:0039906X)
- 巻号頁・発行日
- vol.52, no.1, pp.75-88, 2003-02-01 (Released:2010-09-30)
- 参考文献数
- 25
- 被引用文献数
- 3 5
The effects of fencing uniforms (U) on thermoregulatory responses were analyzed in both practical field investigation (PFI) and laboratory experiment (LE) . In PFI, six fencers (college-aged) performed regular fencing practice wearing U and wearing a short-sleeved shirt and pants (T) in summer. Rectal temperature (Tr), chest skin temperature (Tch), mask temperature (Tmk), heart rate (HR) and sweat rate (SR) were measured during fencing practice. In LE, seven male college-aged subjects performed three sessions of 20-min cycling at light intensity (250 W/m2) in a room temperature maintained at 28 WBGT (wet bulb globe temperature) . Esophageal temperature (Tes), mean skin temperature (Tsk), mean body temperature (Tb), HR, and SR were measured during exercise wearing U and in a semi-nude condition (N) . In both PFI and LE, increases in Tch, Tsk, Tb, Tes, Tr and SR were significantly (p<0.001) greater when wearing U than when wearing T and N. In PFI, the maximal value of Tr correlated significantly with the maximal values of Tch (r=0.513, p<0.001) and SR (r=0.635, p<0.001) during practice wearing U and T. In LE, positive correlations between Tsk and Tes (r=0.797, p<0.001), and between Tb and SR (r=0.658, p<0.02) were found at the end of exercise wearing U and N. In PFI, although the Tsk decreased within a few minutes of a decrease in Tmk, a significant relationship between the decrease in Tmk and Tsk or Tr was not observed during fencing practice. These results demonstrate that when wearing U, a higher skin temperature induces core temperature elevation, and higher skin and core temperatures are associated with increases in SR and HR during exercise in a hot environment. Thus, wearing light clothing during exercise, and taking off the fencing jacket and mask during rest periods would be recommended to reduce the heat stress during fencing practice in hot environments.
- 著者
- 中井 誠一 新矢 博美 芳田 哲也 寄本 明 井上 芳光 森本 武利
- 出版者
- 日本体力医学会
- 雑誌
- 体力科學 (ISSN:0039906X)
- 巻号頁・発行日
- vol.56, no.4, pp.437-444, 2007-08-01
- 被引用文献数
- 8 14
従来の運動指針では,WBGT 28℃が厳重警戒(激しい運動は中止)としており,日常生活を含めた予防指針の基準となると考えられる.従って,高温への順化不足,子どもと高齢者および着衣条件について1段階下げる厳しい基準とした.市民マラソンでは1段階下げた基準としていることも参考とした.今回提案する予防指針は,暑熱順化,年齢,着衣条件が伴う場合はWBGT 25℃以上を厳重警戒とする.日本体育協会によるスポーツ活動時の熱中症予防指針を基準にTable 1に示した.熱中症の発生要因はきわめて複雑であり,思わぬ事態で発生があるのも忘れてはならない.また厳しい基準であるので,日常生活も含め積極的に運動を実施する場合の妨げになることが考えられるが,予防対策を十分に取ることにより解消出来ると考えられる.また,初期症状を見逃さないで早期発見による対応が望まれる.また積極的に屋外での活動を日常生活に取り人れることで早期に暑熱順化を獲得することが必要である.
- 著者
- 新矢 博美 芳田 哲也 高橋 英一 常岡 秀行 中井 誠一
- 出版者
- 日本体力医学会
- 雑誌
- 体力科學 (ISSN:0039906X)
- 巻号頁・発行日
- vol.52, no.1, pp.75-88, 2003-02-01
- 被引用文献数
- 7 5
The effects of fencing uniforms (U) on thermoregulatory responses were analyzed in both practical field investigation (PFI) and laboratory experiment (LE). In PFI, six fencers (college-aged) performed regular fencing practice wearing U and wearing a short-sleeved shirt and pants (T) in summer. Rectal temperature (Tr), chest skin temperature (Tch), mask temperature (Tmk), heart rate (HR) and sweat rate (SR) were measured during fencing practice. In LE, seven male college-aged subjects performed three sessions of 20-min cycling at light intensity (250 W/m^2) in a room temperature maintained at 28 WBGT (wet bulb globe temperature). Esophageal temperature (Tes), mean skin temperature (Tsk), mean body temperature (Tb), HR, and SR were measured during exercise wearing U and in a semi-nude condition (N). In both PFI and LE, increases in Tch, Tsk, Tb, Tes, Tr and SR were significantly (p<0.001) greater when wearing U than when wearing T and N. In PFI, the maximal value of Tr correlated significantly with the maximal values of Tch (r=0.513, p<0.001) and SR (r=0.635, p<0.001) during practice wearing U and T. In LE, positive correlations between Tsk and Tes (r=0.797, p<0.001), and between Tb and SR (r=0.658, p<0.02) were found at the end of exercise wearing U and N. In PFI, although the Tsk decreased within a few minutes of a decrease in Tmk, a significant relationship between the decrease in Tmk and Tsk or Tr was not observed during fencing practice. These results demonstrate that when wearing U, a higher skin temperature induces core temperature elevation, and higher skin and core temperatures are associated with increases in SR and HR during exercise in a hot environment. Thus, wearing light clothing during exercise, and taking off the fencing jacket and mask during rest periods would be recommended to reduce the heat stress during fencing practice in hot environments.
1 0 0 0 OA 年齢階級を考慮した水分摂取基準算定に関する調査的研究
年齢階級を考慮した1日の水分摂取基準を算定することを目的として、乳児・幼児や児童および高齢者を対象に体重計測により1日の水分摂取量や発汗と不感蒸泄による水分損失量(ΣS)を夏季および冬季に測定して、若年成人の値と比較した。1日のΣSは環境温度や活動量の上昇に伴い増加したが、高齢者は成人と同様で、児童、乳児、幼児は若年成人に比べて、それぞれ1. 1倍、1. 9倍、2. 0倍であった。これらの倍率を用いることにより、年齢階級を考慮した水分摂取基準を算定することが可能と考えられた。
1 0 0 0 OA 高温環境における健康生活のための指針づくり
1 0 0 0 OA 現代日本人の水分摂取基準算定に関する調査的研究
体重計測より測定した成人男女における水分出納の結果について, 季節(環境温度)別に発汗と不感蒸泄による水分損失量(ΣS)と身体活動量(エネルギ消費量)との相関を求めた.この回帰式からに季節別・身体活動レベル別にΣSを算出し, さらに排便・排尿による水分損失量(ΣU)を加えて身体活動レベル毎の水分摂取基準を季節別に示した. また生活現場応用を目的として, 冬季の身体活動レベルが低い(I)時のΣSを基準として, その差分を季節・身体活動レベル別に求めた. その結果, 標準体重を有する普通の活動レベル(II)である日本人では, 冬季の低い活動レベル(I)に比べて夏季では男性1.1kg, 女性0.9kg程度多く水分を摂取する等, 現代日本人(成人男女)における具体的な水分摂取基準を作成・提示できた。