Relationship between mean body temperature calculated by two- or three-compartment models and active cutaneous vasodilation in humans : a comparison between cool and warm environments during leg exercise
Relationship between mean body temperature calculated by two- or three-compartment models and active cutaneous vasodilation in humans : a comparison between cool and warm environments during leg exercise
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二室或三室模型计算的平均体温与人体主动皮肤血管舒张之间的关系：腿部运动时凉爽和温暖环境的比较
DOI：
10.1007/s00484-011-0430-9
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发表时间：
2012
影响因子：
3.2
通讯作者：
Koichi
中科院分区：
文献类型：
--
作者：
Demachi;Koichi
本研究的目的是评估根据食道温度 (Tes)、运动肌肉深层组织温度 (Tdt) 和平均皮肤温度 (Tsk) 计算的平均体温 (Tb3) 三室模型是否比根据 Tes 和 Tsk 计算的平均体温 (Tb2) 两分量模型能够更好地匹配体温调节反应。七名男性受试者在 21°C 或 31°C（50% 相对湿度）下以 30% 最大摄氧量进行了 40 分钟的长时间自行车运动。在整个实验过程中，21°C 温度条件下的 Tsk、Tb2、Tb3 和 Tdt 显着（P< 0.01）低于 31°C 温度条件，而 Tes 在两种条件下相似。运动期间，在 21°C 和 31°C 下观察到胸部皮肤血管传导性（皮肤血流量/平均动脉压）（%CVCc）增加，而在 21°C 下前臂未观察到增加。此外，%CVCc 增加开始的 Tb3 和 Tdt 阈值相似，但测试条件之间的 Tes 和 Tb2 阈值显着不同 (P< 0.05)。这些结果表明，与在 21°C 和 31°C 运动期间通过 Tes 和 Tsk 计算的 Tes 或 Tb2 测量的结果相比，胸部主动皮肤血管舒张与 Tb3 或 Tdt 的相关性更密切。
The aim of this study was to assess whether the three-compartment model of mean body temperature (Tb3) calculated from the esophageal temperature (Tes), temperature in deep tissue of exercising muscle (Tdt), and mean skin temperature (Tsk) has the potential to provide a better match with the thermoregulatory responses than the two-component model of mean body temperature (Tb2) calculated from Tes and Tsk. Seven male subjects performed 40 min of a prolonged cycling exercise at 30% maximal oxygen uptake at 21°C or 31°C (50% relative humidity). Throughout the experiment, Tsk, Tb2, Tb3, and Tdt were significantly (P< 0.01) lower at 21°C than at 31°C temperature conditions, while Tes was similar under both conditions. During exercise, an increase in cutaneous vascular conductance (skin blood flow / mean arterial pressure) over the chest (%CVCc) was observed at both 21°C and 31°C, while no increase was observed at the forearm at 21°C. Furthermore, the Tb3 and Tdt threshold for the onset of the increase in %CVCc was similar, but the Tes and Tb2 threshold differed significantly (P< 0.05) between the conditions tested. These results suggest that active cutaneous vasodilation at the chest is related more closely to Tb3 or Tdt than that measured by Tes or Tb2 calculated by Tes and Tsk during exercise at both 21°C and 31°C.