暑熱下の運動開始直後の体温調節反応

スポンサーリンク

概要

• 論文の詳細を見る

• The purpose of this study is to determine the progress of whole body sweating rate (SR) in the initial stage of moderate work in two hot environments, and to relate the SR to the body temperature attained.Four healthy males, 28 to 31 years of age, performed leg exercise of 40% V^^・O_2max with a Monark bicycle ergometer set up on a platform scale (Potter bed balance). All the experiments were carried out in a climatic chamber at ambient temperature (Ta) of 30゜C or 40゜C (relative humidity, 45%) in winter season following body heating for 30 min at a room temperature of 30゜C. Skin sweating was monitored by the bed balance with automatic weight change indicator throughout the experimental period. Rectal (Tre) and 7 skin temperatures were measured every minute by a thermistor and thermocouples, respectively. Oxygen consumption was determined before and during the work by the Douglas bag method. Heart rate was recorded by electrocardiography throughout the experiment.At Ta 40゜C, the SR increased as soon as the work started, whereas at Ta 30゜C it took a few minutes. The mean SR during the work at Ta 40゜C was significantly higher than that at Ta 30゜C. The level of mean skin temperature (T^^-sk) was higher at Ta 40゜C (35゜C) than Ta 30゜C (33゜C), and Tre was approximately 37.3゜C at Ta 30゜C and 40゜C. The changes in the Tre and T^^-sk were similar in two different conditions. The negative correlations were found between the SR and the T^^-sk during the work. The regression line was significantly different at Ta 30゜C and 40゜C. The T^^-sk decreased in proportion to increase of the SR. Moreover, there was a good correlation between the SR and heart rate during the work in both environments. Heat production stood at the same level in two different thermal conditions.The present study suggests that the body core temperature in working men is maintained at least constant level, since the evaporation in the initial stage of the work is largely stimulated, and the reduction of skin temperature may be caused by other factors than the evaporation.

• 日本体力医学会の論文
• 1984-04-01

著者

• 山崎 昌廣

  Department Of Health And Physical Education Faculty Of Integrated Arts And Science Hiroshima Univers

• 山崎 昌広

  熊本大学医学部附属遺伝発生医学研究施設

• 山崎 昌広

  九州工業大学

• 佐々木 隆

  Department Of Physiology Gikyo Junior College

• 山崎 昌廣

  熊本大学・遺伝研・生体制御

• 佐々木 隆

  熊本大学・遺伝研・生体制御

• 鳥居 正史

  熊本大学・体質医学研究所・生理学研究部

関連論文

• 15身体容積の簡易算出方法 : 生理人類学研究会第10回大会紀事
• A Simplified Method for Calculation of Total Body Volume in Men : with reference to body composition
• 運動時全身発汗応答の季節変動からみた体温調節機能の特性
• Continuous Observation of Whole-Body Sweating in Exercising Man under Heat Stress
• 190.初期自転車作業時の皮膚温低下の要因 : 体格,体力,身体組成,環境,栄養,消化
• 223.ヒトの最高発汗能 : 生物科学III (環境・訓練,管理など)
• 歩行時エネルギー消費量推定ノモグラムの作成
• Thermographyによるsubmaximal自転車駆動時の上肢皮膚温の観察
• 123.歩行運動に倉ける四肢動作の左右非対称性について : 運動生理学的研究II : 第40回日本体力医学会大会
• 10.トレッドミル歩行時における下肢動作の常同性とその性差 : 運動生理学的研究II
• 暑熱下の運動開始直後の体温調節反応
• 166.歩幅の自己回帰パワースペクトルにおよぼす中枢活動の影響 : 運動生理学的研究II
• 走行リズム形成における中枢性支配の解析 : 運動生理学的研究 II
• Stereotyped Pattem of Lower Limb Movement during Level and Grade Walking on Treadmill

もっと見る 閉じる

スポンサーリンク