School of Resource & Environment and Safety Engineering, Hunan University of Science and Technology, Xiangtan 411201, China.
School of Energy and Building Environment Engineering, Guilin University of Aerospace Technology, Guilin 541004, China.
Int J Environ Res Public Health. 2021 Jul 17;18(14):7615. doi: 10.3390/ijerph18147615.
This study aimed to determine whether heart rate variability (HRV) can express the thermal comfort of mine workers. Eight subjects ran on a treadmill (5.5 km/h) to simulate heavy labor in three kinds of mining environments (22 °C/90%, 26 °C/90%, 30 °C/90%), respectively. Based on the measured electrocardiogram (ECG) data, the HRV of the subjects was calculated. The results showed that the HRV indices changed obviously under different temperature environments. In the neutral and hot environment, except for the LF, TP and LF/HF, there were significant differences in each index. However, there was no significant difference between the cold and neutral environments. The R-R intervals, the very low-frequency power (VLF), pNN20 and SampEN had strong negative correlation with the thermal sensation of people from sitting to work (ρ < -0.700). These indices may be used as thermal comfort predictive biomarkers of mine workers.
本研究旨在确定心率变异性（HRV）是否可以表达矿工的热舒适感。8 名受试者分别在三种采矿环境（22°C/90%、26°C/90%、30°C/90%）下在跑步机上跑步（5.5 公里/小时）以模拟重体力劳动。根据测量的心电图（ECG）数据，计算受试者的 HRV。结果表明，在不同的温度环境下，HRV 指数明显变化。在中性和热环境中，除 LF 外，TP 和 LF/HF 外，各指数均有显著差异。然而，寒冷和中性环境之间没有显著差异。R-R 间期、极低频功率（VLF）、pNN20 和 SampEN 与从坐姿到工作的人的热感觉呈强烈负相关（ρ< -0.700）。这些指标可能可作为矿工热舒适的预测生物标志物。
