Quantitative analysis of the relationship between muscle temperature measured by non-invasive method, thermoregulatory responses, and work performance during dynamic exercise

本研究旨在定量分析动态运动过程中无创性肌温测量方法（零热流法，ZHF）与体温调节反应、有氧和无氧运动能力之间的关系，阐明ZHF方法的有效性和高温环境下最佳肌温维持工作能力。 在运动过程中使用注水服测量身体冷却或身体变暖的生理反应。结果表明，在高强度运动时，当体温升高幅度较大时，用ZHF法测得的头部深部温度可以准确地估计出核心温度（食道温度）。本研究还提示，无氧运动和有氧运动时，维持下肢肌温并减轻热应激的最佳工作表现温度分别为36 ℃和34 ℃。

This study performed to analyze quantitatively the relationship between active muscle temperature measured by non-invasive method (zero-heat-flow method, ZHF), thermoregulatory responses, and aerobic and anaerobic performance during dynamic exercise, and clarify the usefulness of ZHF method and optimal muscle temperature maintaining work performance in hot environments. Physiological responses to body cooling or body warming were measured using water perfused suits during exercise. As a results, core temperature (esophageal temperature) could be estimate accurately from deep head temperature measured by ZHF method when increases in body temperature were greater during high intensity of exercise. Furthermore, present study suggested that the optimal lower limb muscle temperature maintaining work performance with attenuation of heat stress was 36 degree C for anaerobic exercise and/or 34 degree C for aerobic exercise.