Cardiovascular Physiology and Rehabilitation Laboratory, University of British Columbia, Lower Mall Research Station, Room 208, 2259 Lower Mall, Vancouver, BC, V6T 1Z4, Canada.
Faculty of Medicine, School of Clinical Sciences, Monash University, Melbourne, VIC, Australia.
Int Arch Occup Environ Health. 2021 Jul;94(5):823-831. doi: 10.1007/s00420-020-01641-3. Epub 2021 Jan 11.
To understand the association between heart rate variability and indices of fatigue, total sleep time, and reaction time in shift workers.
Ten participants from the British Columbia Wildfire Service management team were examined over a 14-day active fire-line period. Daily measures of subjective fatigue, sleepiness, and alertness were recorded using a visual analog scale. Daily total sleep time was recorded using a wrist actigraph. Cardiac autonomic modulation was examined each morning using heart rate variability (HRV). Three measures of reaction time (simple reaction time, choice reaction tie, and discriminatory reaction time) was examined on days 1, 5, 10, and 14. Multiple linear regression analysis was utilized to examine the association between HRV and indices of fatigue, total sleep time, and reaction time.
Mean shift duration was 13.8 ± 0.77 h. Significant inverse associations were observed between HRV and sleepiness [r = - 0.60, p = 0.000] and fatigue [r = - 0.55, p = 0.000], and a positive association with total sleep time (min) [r = 0.28, p = 0.009]. There were no significant relationships between HRV and simple reaction time (ms) [r = - 0.32, p = 0.182], choice reaction time (ms) [r = - 0.10, p = 0.850], or discriminatory reaction time (ms) [r = - 0.09, p = 0.881].
HRV displayed significant associations with indices of fatigue and sleep, whereby demonstrating its utility as a practical tool for monitoring the development of fatigue in wildland firefighters and for providing insight when to make lifestyle modifications to preserve alertness.
了解心率变异性与轮班工人的疲劳指数、总睡眠时间和反应时间之间的关系。
对不列颠哥伦比亚省野火服务管理团队的 10 名参与者进行了为期 14 天的活跃火线期的检查。使用视觉模拟量表记录每天的主观疲劳、困倦和警觉度的测量值。使用腕部活动记录仪记录每天的总睡眠时间。每天早上使用心率变异性（HRV）检查心脏自主神经调节。在第 1、5、10 和 14 天检查了三种反应时间（简单反应时间、选择反应时间和辨别反应时间）。利用多元线性回归分析检查 HRV 与疲劳指数、总睡眠时间和反应时间之间的关系。
平均轮班持续时间为 13.8±0.77 小时。HRV 与困倦（r=-0.60，p=0.000）和疲劳（r=-0.55，p=0.000）呈显著负相关，与总睡眠时间（分钟）呈正相关（r=0.28，p=0.009）。HRV 与简单反应时间（ms）（r=-0.32，p=0.182）、选择反应时间（ms）（r=-0.10，p=0.850）或辨别反应时间（ms）（r=-0.09，p=0.881）之间无显著关系。
HRV 与疲劳和睡眠指数呈显著相关，表明其作为监测野外消防员疲劳发展的实用工具具有实用性，并为提供何时进行生活方式改变以保持警觉性提供了深入了解。
