Comparison of utilized coefficient of friction during different walking tasks in persons with and without a disability
Comparison of utilized coefficient of friction during different walking tasks in persons with and without a disability
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DOI：
10.1016/j.gaitpost.2004.07.004
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发表时间：
2005-08-01
期刊：
影响因子：
2.4
通讯作者：
Powers, CM
中科院分区：
文献类型：
--
作者：
Burnfield, JM;Tsai, YJ;Powers, CM
本研究的目的是确定在各种行走条件下，残疾老年人是否比健康的老年人和年轻人具有更大的摩擦系数要求。根据医学诊断和年龄，将48名社区居民成年人分为5组：CVA（单侧卒中;平均年龄63岁）、DM（糖尿病;平均年龄70岁）、阿尔斯（下肢关节炎;平均年龄69岁）、老年人（健康;平均年龄73岁）和青年人（健康;平均年龄29岁）。当受试者走过人行道、上下楼梯以及转弯时，记录地面反作用力（GRF）。整个站立过程中使用的摩擦系数（COFU）计算为剪切与垂直GRF的比值，并确定了导致前足滑动的剪切力产生的峰值COFU。使用单独的单因素ANOVA来确定每个行走任务的受试者组之间COFU峰值的差异。这项研究的结果发现，在所有评估的条件下，残疾人并没有表现出比没有残疾的成年人更大的摩擦要求。在转弯谈判时，YOUNG组的摩擦需求明显大于所有残疾组，在水平行走时也大于DM组。这些结果表明，在本研究中评价的诊断组在评价的任务期间发生滑倒的风险并不比健康的老年人或年轻人高。(c)2004 Elsevier B. V.保留所有权利。
The purpose of this study was to determine if older persons with a disability have greater utilized coefficient of friction requirements than healthy older and younger adults during various walking conditions. Forty-eight community-dwelling adults were divided into five groups based on medical diagnosis and age: CVA (unilateral stroke; mean age 63 years), DM (diabetes mellitus; mean age 70 years), ARTH (lower extremity arthritis; mean age 69 years), SENIOR (healthy; mean age 73 years), and YOUNG (healthy; mean age 29 years). Ground reaction forces (GRF) were recorded as subjects walked across a walkway, ascended and descended stairs, and negotiated a turn. The utilized coefficient of friction (COFU) throughout stance was calculated as the ratio of shear to vertical GRFs, and the peak COFu resulting from a shear force that would contribute to a forward foot slip was identified. Separate one-way ANOVAs were used to identify differences in peak COFU across subject groups for each walking task. The results of this study found that for all conditions evaluated, those with a disability did not demonstrate greater friction requirements then adults without a disability. Friction requirements for the YOUNG group were significantly greater than all disability groups while negotiating a turn, and were greater than the DM group during level walking. These results indicated that the diagnostic groups evaluated in this study are not at any greater risk for slip initiation than the healthy older or younger adults during the tasks evaluated. (c) 2004 Elsevier B.V. All rights reserved.