Influence of Varying Level Terrain on All correspondence and requests for Wheelchair Propulsion Biomechanics
Influence of Varying Level Terrain on All correspondence and requests for Wheelchair Propulsion Biomechanics
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DOI：
10.1097/phm.0b013e31818a52cc
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发表时间：
2008-12-01
影响因子：
3
通讯作者：
An, Kai-Nan
中科院分区：
文献类型：
--
作者：
Hurd, Wendy J.;Morrow, Melissa M. B.;An, Kai-Nan
目的：评估日常生活中遇到的平地条件下手动轮椅的推进力。 设计：受试者包括 14 名经验丰富的手动轮椅使用者（13 名脊髓损伤 [SCI]，1 名脊柱裂），目前没有上肢损伤或疼痛症状。受试者以自行选择的速度推动轮椅穿过四种不同的水平地面条件，包括光滑和骨料混凝土以及瓷砖和地毯地板。在推进的稳态阶段，从装有仪器的轮椅边缘获得双边时间和动力学测量结果。结果：任何时间或动力学变量都没有两侧差异。推进速度和推轮接触时间在各种地面条件下都是一致的。在这两种混凝土条件下，推进频率明显高于瓷砖或地毯地面条件。在骨料混凝土地面条件下，力和力矩最大，在瓷砖地板上推进时最小。结论：水平表面地形的滚动阻力显着影响轮椅推进生物力学。识别可能导致上肢病理的环境条件是手动轮椅使用者预防伤害和维持功能能力的一步。这些结果可用于协助家庭和社区地形设计，以最大限度地减少与轮椅推进相关的需求。
Objective: To evaluate manual wheelchair propulsion across level ground conditions that are encountered during everyday life.Design: Subjects included 14 individuals (13 with spinal cord injury [SCI], 1 with spina bifida) who were experienced manual wheelchair users and had no current upper extremity injury or pain complaints. Subjects propelled their wheelchairs at a self-selected speed across four different level ground conditions, including smooth and aggregate concrete and tile and carpet flooring. Temporal and kinetic measurements were obtained bilaterally from instrumented wheelchair rims during the steady-state phase of propulsion.Results: There were no side-to-side differences for any of the temporal or kinetic variables. Propulsion velocity and pushrim contact time were consistent across ground conditions. Propulsion frequency was significantly greater during both concrete conditions than either tile or carpet ground conditions. Forces and moments were greatest during the aggregate concrete ground condition and lowest during propulsion across tile flooring.Conclusions: The rolling resistance of level surface terrain significantly impacts wheelchair propulsion biomechanics. Identification of environmental conditions that may contribute to upper extremity pathology is a step toward injury prevention and maintenance of functional abilities for the manual wheelchair user. These results may be used to assist with home and community terrain design to minimize the demands associated with wheelchair propulsion.