Institute of Health and Sports Science, University of Tsukuba, Tsukuba, Ibaraki 305-8574, Japan.
Eur J Appl Physiol. 2009 Nov;107(5):527-34. doi: 10.1007/s00421-009-1152-0. Epub 2009 Aug 14.
To test the hypothesis that the hyperthermia-induced ventilatory response relates to aerobic power and/or the cutaneous vasodilatory response during exercise, we asked 18 subjects to perform 3 kinds of exercise: an incremental exercise to determine peak oxygen consumption (V(O)(2peak)), a steady state exercise at 50% of V(O)(2peak) to determine the ventilatory response to increasing body temperature, and a steady state exercise at 60% of V(O)(2peak) to determine the cutaneous vasodilatory response to increasing body temperature. The ventilatory and cutaneous vasodilatory responses were evaluated by plotting the increase in minute ventilation or in forearm vascular conductance against the increase in oesophageal temperature. Regression analysis revealed that: (1) there was a negative relationship between the hyperthermic ventilatory response and cutaneous vasodilatory response, (2) there was a negative relationship between the hyperthermic ventilatory response and V(O)(2peak), and (3) there was a positive relationship between the cutaneous vasodilatory response and V(O)(2peak). These results support our hypothesis and suggest that exercise training suppresses the hyperthermic ventilatory response and improves the thermoregulatory response.
为了验证热诱导通气反应与运动时的有氧能力和/或皮肤血管舒张反应有关的假设，我们要求 18 名受试者进行 3 种运动：递增运动以确定最大摄氧量（V(O)(2peak)），以 50%的 V(O)(2peak)进行的稳态运动以确定体温升高时的通气反应，以及以 60%的 V(O)(2peak)进行的稳态运动以确定体温升高时的皮肤血管舒张反应。通过绘制分钟通气量或前臂血管传导率与食管温度升高之间的关系来评估通气和皮肤血管舒张反应。回归分析显示：（1）热诱导通气反应与皮肤血管舒张反应呈负相关，（2）热诱导通气反应与 V(O)(2peak)呈负相关，（3）皮肤血管舒张反应与 V(O)(2peak)呈正相关。这些结果支持我们的假设，并表明运动训练抑制热诱导通气反应并改善体温调节反应。
