The paper explores the risk of work-related musculoskeletal injury in tying steel reinforcement bars. Three tools are compared to determine the extent to which ergonomically designed tools can reduce the risk of injury to the back and wrist in steel-tying. A whole body system of wearable sensors was used to measure biomechanical risk in tying. Three tools were assessed to determine their impact on the risk of work-related musculoskeletal injury when used at different heights. These were: a conventional pincer- cutter tool; a power-driven tying tool, and a long handled stapler tool. No tool was found to work best in all situations. The long handled stapler tool significantly reduced trunk inclination when used from ground to shoulder height but produced higher trunk extension (backward bending) when used above shoulder height. The power tying tool did not reduce the need to bend when working at lower work heights. The power tying tool produced significantly lower peak wrist flexion values compared to the conventional pincercutter tool at all work heights except overhead. The power tying tool involved significantly lower levels of wrist rotation than the conventional pincer-cutter tool at all work heights above knee level. Many assessments of ergonomic risk factors in construction rely on observational methods. The use of small, lightweight wearable sensors permits the objective measurement of biomechanical risk factors for work-related musculoskeletal injury, as well as providing objective performance data that can be used in the design and selection of task-specific tools. Our analysis of work by height also provides insight into the way in which the risk factors and reduction opportunities afforded by different tools vary depending on the height at which work is performed.

中文翻译：

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绑扎钢筋时工具选择对背部和腕部受伤风险的影响：单例实验

本文探讨了绑扎钢筋时与工作有关的肌肉骨骼损伤的风险。比较了三种工具，以确定根据人体工程学设计的工具可以在多大程度上减少绑扎钢带对背部和手腕造成伤害的风险。使用可穿戴传感器的全身系统来测量绑扎的生物力学风险。评估了三种工具，以确定它们在不同高度下使用时对与工作有关的肌肉骨骼损伤的风险的影响。它们是：传统的钳刀工具；动力打捆工具和长柄订书机工具。找不到任何工具在所有情况下都能发挥最佳作用。长久使用的订书机工具在从地面到肩膀的高度使用时可显着减小躯干倾斜度，但在高于肩膀的高度上使用时可产生更高的躯干伸展度（向后弯曲）。在较低的工作高度下工作时，电动捆扎工具不会减少弯曲的需要。与传统的剪钳工具相比，电动绑扎工具在除头顶以外的所有工作高度下产生的腕部屈曲峰值均大大降低。在高于膝盖水平的所有工作高度下，电动打结工具的腕部旋转程度均大大低于传统的钳式工具。施工中对人体工程学危险因素的许多评估都依赖于观察方法。使用小巧，轻便的可穿戴传感器可以客观地测量与工作有关的肌肉骨骼损伤的生物力学危险因素，并提供可以用于设计和选择任务特定工具的客观性能数据。