Within a dynamic and complex working environment, fatigue statuses (involving physical and mental fatigue) of workers on construction sites tend to have a more serious impact on work performance than general workplaces. To improve safety management on sites, valid fatigue management measures for workers are urgently required. Specifically, there are construction activities requiring both physical and cognitive effort. As a critical premise for putting forward feasible fatigue management measures, correlations between physical and mental fatigue on work performance should be identified. This research explored the effects of physical fatigue on the induction of mental fatigue of construction workers, by adopting a pilot experimental method. Manual handling tasks of different intensities were firstly designed for stimulating certain expected physical fatigue statuses. A cognition-required risk identification task was then arranged for inducing mental fatigue, during which a wearable electroencephalogram (EEG) sensor was utilized for fatigue detection and measurement. Through a comprehensive data analysis method based on EEG rhythms, it was found that the high physical fatigue can significantly accelerate the induction of mental fatigue. Considering the resource allotment, more vigilant and attentional resources were required during the intensive manual handling tasks for the highly controlled limbs and the mind to steps. Thus, additional resources were invested to maintain the same level of cognitive performance in the risk identification tasks, which led to the increased mental fatigue. In practice, the heavy physical task can be regarded as one of the factors affecting the development of mental fatigue status, and therefore impairing cognitive functioning and other mental performances of the brain. The pilot study results provided a reference for fatigue management of construction workers to promote comprehensive safety management on construction sites.

中文翻译：

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身体疲劳对建筑工人精神疲劳诱发的影响：基于神经生理学方法的初步研究

在动态复杂的工作环境中，工地工人的疲劳状态（包括身心疲劳）往往比一般工作场所对工作绩效的影响更为严重。为提高现场安全管理水平，迫切需要对工人采取有效的疲劳管理措施。具体来说，有些建筑活动需要体力和认知努力。作为提出可行的疲劳管理措施的关键前提，应确定身心疲劳与工作绩效之间的相关性。本研究采用中试实验方法，探讨身体疲劳对建筑工人精神疲劳诱发的影响。不同强度的手动处理任务首先被设计用于刺激某些预期的身体疲劳状态。然后安排认知所需的风险识别任务来诱导精神疲劳，在此期间，可穿戴脑电图 (EEG) 传感器被用于疲劳检测和测量。通过基于脑电节律的综合数据分析方法，发现高度的身体疲劳可以显着加速精神疲劳的诱发。考虑到资源分配，在高度控制的四肢和意识步的密集手动处理任务中需要更多的警惕和注意力资源。因此，在风险识别任务中投入了额外的资源以保持相同水平的认知表现，这导致了精神疲劳的增加。在实践中，繁重的体力任务可被视为影响心理疲劳状态发展的因素之一，从而损害大脑的认知功能和其他心理表现。试点研究结果为施工人员疲劳管理提供参考，促进施工现场安全综合管理。