Vincent Grace E, Ridgers Nicola D, Ferguson Sally A, Aisbett Brad
a Centre for Physical Activity and Nutrition Research , Deakin University , Burwood , Australia.
b Bushfire Co-Operative Research Centre , East Melbourne , Australia.
Ergonomics. 2016 Jul;59(7):924-31. doi: 10.1080/00140139.2015.1107626. Epub 2016 Jan 18.
The aim of this study was to examine the associations between firefighters' physical activity levels across consecutive wildfire suppression shifts and to determine whether sleep duration moderated these associations. Forty volunteer firefighters (31 males, 9 females) wore an activity monitor to concurrently measure physical activity and sleep duration. Sedentary time and time spent in light- (LPA), moderate- (MPA), and vigorous-intensity physical activity (VPA) during each shift were determined using monitor-specific cut points. During any given shift, every additional 60 min spent in LPA was associated with 7.2 min more LPA and 27.6 min MPA the following shift. There were no other significant positive or negative associations. No significant moderating effect of total sleep time was observed. Firefighters are able to maintain and/or increase their physical activity intensity between consecutive shifts. Further research is needed to understand firefighters pacing and energy conservation strategies during emergency wildfire deployments. Practitioner Summary: To examine associations between firefighters' physical activity levels across consecutive shifts during a multi-day emergency wildfire and determine whether sleep duration moderated these associations. Firefighters are able to maintain and/or increase their physical activity intensity between consecutive shifts. No significant moderating effect of total sleep time was observed.
本研究的目的是检验连续野火扑救轮班期间消防员身体活动水平之间的关联，并确定睡眠时间是否会调节这些关联。40名志愿消防员（31名男性，9名女性）佩戴活动监测器，同时测量身体活动和睡眠时间。使用监测器特定的切点来确定每个轮班期间的久坐时间以及在轻度（LPA）、中度（MPA）和剧烈强度身体活动（VPA）中所花费的时间。在任何给定的轮班期间，每多花60分钟进行LPA，在下一个轮班中就会多7.2分钟的LPA和27.6分钟的MPA。没有其他显著的正相关或负相关。未观察到总睡眠时间有显著的调节作用。消防员能够在连续轮班之间维持和/或提高他们的身体活动强度。需要进一步研究以了解消防员在紧急野火部署期间的节奏控制和能量保存策略。从业者总结：检验多日紧急野火期间消防员连续轮班之间身体活动水平的关联，并确定睡眠时间是否会调节这些关联。消防员能够在连续轮班之间维持和/或提高他们的身体活动强度。未观察到总睡眠时间有显著的调节作用。
