熱流補償法を用いて測定した運動時の前額部深部温と食道温との関係  [in Japanese] Relationship between the deep forehead temperature measured by the zero-heat-flow method and esophageal temperature during exercise in humans  [in Japanese]

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Abstract

熱流補償法を用いて測定した前額部深部温(Tch)から中枢温の指標である食道温(Tes)を運動時に推定する精度について検討するため,7 名の被験者を対象に最大酸素摂取量の 20%および 50%の負荷にて 30 分間の自転車運動を 28℃,24℃,20℃の環境温度下にて実施した.Tch は熱流補償法を用いた深部温度計(Coretemp)を前額部に装着し,Tes は熱電対を鼻から挿入して測定した.Tes と Tch の間には全ての環境温度下において有意な相関が認められたが,その決定係数(r<sup>2</sup>)は環境温度が低くなると低下した(28℃:0.555,24℃:0.647,20℃:0.491).また,環境温度が低くなると Tch の Tes に対する測定精度(偏りと一致限界)は低下し,応答時間も遅くなった.運動強度についても強度が低下すると環境温度の低下と同様の結果が得られた.以上より,運動時において Tch から Tes を推定する精度は環境温度や運動強度の影響を受けることが明らかになった.<br>

To establish the accuracy and precision of deep forehead temperature (Tch) measured by the zero-heat-flow method, Tch was compared with the esophageal temperature (Tes), as an index of core temperature, during 30 min of a cycling exercise at 20% and 50% of maximal oxygen uptake in seven male subjects under 28°C, 24°C, and 20°C environmental temperature conditions. The Tes was measured by placing a thermocouple probe in the esophagus through the subject’s nostril, and Tch was also measured by using Coretemp thermometer probe fixed on forehead. Tch significantly correlated with Tes, correlation coefficient (r<sup>2</sup>) between two parameters under 28°C, 24°C, and 20°C environmental temperature conditions were 0.555, 0.647, and 0.491, respectively. From the Bland-Altman analysis, the off set (Tes-Tch) and the precision were significantly lower, and also delay time was significantly (p<0.05) longer according to the lowing ambient temperature or exercise intensity. These results suggest that the accuracy and precision of Tch that estimate to Tes were affected by environmental temperature and exercise intensity.<br>

Journal

  • JAPANESE JOURNAL OF BIOMETEOROLOGY

    JAPANESE JOURNAL OF BIOMETEOROLOGY 48(4), 119-127, 2011-12-01

    Japanese Society of Biometeorology

References:  19

Codes

  • NII Article ID (NAID)
    10030346517
  • NII NACSIS-CAT ID (NCID)
    AN00193590
  • Text Lang
    JPN
  • Article Type
    ART
  • ISSN
    03891313
  • NDL Article ID
    023439417
  • NDL Call No.
    Z19-618
  • Data Source
    CJP  NDL  J-STAGE 
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