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首页> 外文期刊>Journal of Biomechanics >Effects of incremental ambulatory-range loading on arch height index parameters
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Effects of incremental ambulatory-range loading on arch height index parameters

机译：动态范围载荷对足弓高度指数参数的影响

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Deformation of the medial longitudinal arch under body weight loading is often assessed using the Arch Height Index Measurement System. This system assesses change in arch height between sitting and standing, estimated to be 10% and 50% of body weight, respectively. However, body weight forces during ambulation exceed these loads, therefore limiting our understanding of arch deformation under ambulatory load ranges. Thus, the study aims were (1) to assess if sitting and standing arch height differed from that seen under 10% and 50% body weight using a force target-matching procedure, and (2) to quantify the assumed linearity of arch stiffness, measured statically, throughout an ambulatory load range. Established sitting and standing arch height measurements were taken from 25 healthy subjects, who also underwent testing from 10% to 120% body weight in sequential 10% increments. Arch deformation in sitting was less than for 10% body weight, whereas the standing and 50% condition did not differ. The incremental loading data revealed linear and curvilinear trends between arch deformation and loading through the ambulatory range, such that further deformation beyond that seen at 120% would be minimal using these procedures. These data suggest that sitting arch loads and deformation are less than those seen at 10% body weight, which affects known parameters such as arch stiffness. Further, the curvilinear trend in the arch height data suggests that most arch deformation occurs in the ambulatory load range for a healthy foot. (C) 2016 Elsevier Ltd. All rights reserved.
机译：经常使用足弓高度指数测量系统评估在体重负荷下内侧纵弓的变形。该系统评估坐立和站立之间足弓高度的变化，估计分别为体重的10％和50％。但是，在步行过程中，体重力超过了这些负载，因此限制了我们对动态负载范围内足弓变形的理解。因此，这项研究的目的是（1）使用力目标匹配程序评估坐姿和站立型足弓高度是否与10％和50％体重下所观察到的高度不同;以及（2）量化假定的足弓刚度线性度，在动态负载范围内静态测量。建立的坐姿和站立姿足弓高度测量来自25位健康受试者，他们也接受了从10％到120％体重的测试，以10％的顺序递增。坐姿的足弓变形小于体重的10％，而坐姿和50％的状况无差异。递增的荷载数据显示了整个步行范围内拱形变形和荷载之间的线性和曲线趋势，因此使用这些程序，超出120％的变形范围的进一步变形将是最小的。这些数据表明，足弓的坐姿载荷和变形小于体重为10％时的载荷和变形，这会影响已知的参数，例如弓的刚度。此外，足弓高度数据中的曲线趋势表明，大多数足弓变形发生在对健康脚部的步行负荷范围内。 （C）2016 Elsevier Ltd.保留所有权利。

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