Pajoutan Mojdeh, Cavuoto Lora A, Mehta Ranjana K
a Department of Industrial and Systems Engineering , University at Buffalo , Buffalo , New York.
b Department of Environmental and Occupational Health , Texas A&M University , College Station , Texas.
J Occup Environ Hyg. 2017 Oct;14(10):786-792. doi: 10.1080/15459624.2017.1334902.
This study evaluates whether the existing force-endurance relationship models are predictive of endurance time for overweight and obese individuals, and if not, provide revised models that can be applied for ergonomics practice. Data was collected from 141 participants (49 normal weight, 50 overweight, 42 obese) who each performed isometric endurance tasks of hand grip, shoulder flexion, and trunk extension at four levels of relative workload. Subject-specific fatigue rates and a general model of the force-endurance relationship were determined and compared to two fatigue models from the literature. There was a lack of fit between previous models and the current data for the grip (ICC = 0.8), with a shift toward lower endurance times for the new data. Application of the revised models can facilitate improved workplace design and job evaluation to accommodate the capacities of the current workforce.
本研究评估现有的力量耐力关系模型是否能预测超重和肥胖个体的耐力时间，若不能，则提供可应用于人体工程学实践的修正模型。数据收集自141名参与者（49名正常体重、50名超重、42名肥胖），他们每人在四个相对工作量水平上进行了握力、肩部屈曲和躯干伸展的等长耐力任务。确定了个体特定的疲劳率和力量耐力关系的通用模型，并与文献中的两个疲劳模型进行了比较。对于握力，先前模型与当前数据之间存在拟合不足（组内相关系数ICC = 0.8），新数据的耐力时间向更低值偏移。应用修正模型有助于改进工作场所设计和工作评估，以适应当前劳动力的能力。
