Abstract：
Firefighters risk heat strain during occupational tasks when exposed to extremely hot environmental conditions and performing high-intensity work. Relevant training scenarios are therefore essential. This study investigated the effect of a single simulated smoke dive and the following recovery phase on physiological and perceptual responses. Nineteen professional male firefighters (43 ± 8 yr) performed a 2-min stair walk and a15-min simulated smoke dive in a two-floor heat chamber (110 °C to 272°C) (HEAT), followed by a 5-min stair walk outside the heat chamber. Heart rate (HR), gastrointestinal temperature (Tgi) and skin temperatures were registered continuously during the test. The Tgi increased significantly from the start (37.5 ± 0.3°C) to the end of HEAT (38.4 ± 0.4°C) and further increased after the heat exposure (39.6 ± 0.5°C).The HR also increased significantly from the start (92 ± 14 bpm) to the end of HEAT (185 ± 13 bpm) and increased after the heat exposure to a maximum of 190 ± 13 bpm. The simulated smoke dive induced high physiological strain on the firefighters, and the increase in Tgi and HR after the hot exposure must be considered during live fire events when repeated smoke dives are required.
摘要：
消防员在暴露于极热的环境条件下并进行高强度工作时，在职业任务中会面临热压力。因此，相关的培训方案至关重要。这项研究调查了单次模拟烟雾潜水和随后的恢复阶段对生理和知觉反应的影响。19名专业男性消防员（43±8年）在两层楼的加热室（110°C至272°C）（HEAT）中进行了2分钟的楼梯行走和15分钟的模拟烟雾潜水，然后在加热室外面走5分钟的楼梯。心率(HR)在测试期间连续记录胃肠温度(Tgi)和皮肤温度。Tgi从开始（37.5±0.3°C）到HEAT结束（38.4±0.4°C）显着增加，并且在热暴露后（39.6±0.5°C）进一步增加。HR从HEAT开始（92±14bpm）到结束（185±13bpm）也显着增加，并且在热暴露后增加至最大190±13bpm。模拟烟雾潜水对消防员造成了很高的生理压力，当需要反复进行烟雾潜水时，必须在现场火灾事件中考虑热暴露后Tgi和HR的增加。
