One factor commonly associated with musculoskeletal disorder risk is extreme postures. To lessen this risk, individuals must be in an as neutral posture as possible while working. We analyzed how the inclusion of different combinations of two interventions-knee pads and knee savers-can alter lower extremity kinematics during deep or near full flexion kneeling occurs while on different sloped surfaces. Nine male subjects were requested to keep a typical resting posture while kneeling on sloped roofing simulator. We observed that the introduction of a wearable third party device considerably altered lower extremity full flexion kneeling kinematics compared to level deep kneeling. This study provided a sound base for the use of third party devices to reduce musculoskeletal disorder risk on a sloped surface, however further testing with other musculoskeletal disorder risk factors is needed prior to conclusive recommendation.

中文翻译：

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膝盖保护器和护膝是否是减少住宅屋顶工人下肢肌肉骨骼疾病风险的可行干预措施？

通常与肌肉骨骼疾病风险相关的一个因素是极端姿势。为了降低这种风险，个人在工作时必须尽可能保持中立姿势。我们分析了两种干预措施（护膝和护膝）的不同组合如何在不同倾斜表面上发生深屈或接近完全屈曲时改变下肢运动学。九名男性受试者被要求保持典型的休息姿势，同时跪在倾斜的屋顶模拟器上。我们观察到，与水平深跪相比，可穿戴第三方设备的引入显着改变了下肢完全屈曲跪的运动学。这项研究为使用第三方设备降低倾斜表面上的肌肉骨骼疾病风险提供了良好的基础，