着衣条件の違いによる皮膚温変化が運動時の体温反応と温熱ストレスに与える影響

スポンサーリンク

概要

論文の詳細を見る
To clarify the effects of varying skin temperature due to several types of clothing on temperature responses and heat-stress during exercise, we analyzed thermoregulatory responses while wearing various types of sportswear including soccer (SC), baseball (BB), and fencing uniforms (FU), and while wearing water-perfused suits (WS) and vests (WV) during exercise in a hot environment. We also compared these results with those obtained under a semi-nude condition (NU). Eight male subjects performed three 20-min cycling sessions at light intensity (250W/m^2) in a room maintained at 28℃ (wet-bulb globe temperature, WBGT). The experiment was performed under ten conditions, with six sets of clothing, WS and WV at 14℃ (WS14, WV14), 20℃ (WS20, WV20) and 26℃ (WS26, WV26), and FU, SC, BB or NU. While wearing sportswear, increases in esophageal (△Tes), mean skin (Tsk), mean body (Tb) temperature, heart rate (HR), thermal sensation (TS) at the end of exercise, and total sweat loss (m_<sw.tot>) during exercise were significantly (p<0.01) higher in BB and FU than in NU. In comparison to WS or WV conditions, △Tes was significantly (p<0.01) higher under WV conditions than under NU, while there was no significant difference in △Tes between WS and NU. Tsk, Tb, HR, TS and m_<sw.tot> tended to be lower in WS14 and 20, and higher in WV26 than in NU. Under all conditions at the end of exercise, the △Tes markedly increased when Tsk exceeded 34℃; and △Tes was significantly correlated with Tsk (r=0.861, p<0.01) for all conditions except WS14 and 20. For Tsk less than 34℃, however, △Tes remained constant. △Tes, Tsk, and Tb significantly correlated with HR (r=0.932, p<0.001), TS (r=0.888, p<0.001), and m_<sw.tot> (r=0.961, p<0.001), respectively. These results show that during light exercise under hot conditions, 1) in several types of clothing, a critical level of skin temperature causing core temperature elevation may exist, 2) cooling the skin temperature can alleviate heat-stress due to body temperature elevation, and 3) the semi-nude condition is the simplest method of alleviating core temperature elevation without using body cooling materials such as WS or WV.
日本体力医学会の論文
2005-06-01

著者

関連論文

もっと見る

スポンサーリンク