Acceleration of the calcaneus at heel strike in neutrally aligned and pes planus feet

被引:17
作者
Ledoux, WR
Hillstrom, HJ
机构
[1] VA Puget Sound Hlth Care Syst, Rehabil Res & Dev Ctr, Seattle, WA 98108 USA
[2] Univ Washington, Dept Orthopaed & Sports Med, Seattle, WA 98195 USA
[3] Temple Univ, Sch Podiat Med, Gait Study Ctr, Philadelphia, PA 19122 USA
关键词
acceleration; foot calcaneus; comfortable cadence; neutrally aligned; pes planus;
D O I
10.1016/S0268-0033(01)00041-9
中图分类号
R318 [生物医学工程];
学科分类号
0831 ;
摘要
Objective. The purpose of this research was twofold: (1) to study the impulsive acceleration of the calcaneus at heel strike in subjects with neutrally aligned (i.e., normal) feet and (2) to explore how the acceleration may differ in subjects with pes planus (i.e., flat). feet. The component of the acceleration vector aligned with the long axis of the tibia was quantified. Design. Subjects with either foot type were instrumented and calcaneal acceleration was quantified during comfortable cadence locomotion. Background. Aberrant peak acceleration has been associated with osteoarthritis. while tibial acceleration has been quantified, calcaneal acceleration has not. Additionally, foot morphology, or foot type, has demonstrated an effect on foot function and thus there may. be differences in calcaneal acceleration between foot types. Methods. Six subjects with neutrally aligned feet and six with pes planus feet were selected via a clinical exam. Accelerometers were attached to the posterior aspect of the medial surface of the calcanei bilaterally and 10 walking trials were collected. Results. The average baseline-to-peak acceleration for the neutrally aligned and pes planus feet was 4.79 g (SD, 2.14 g) and 5.24 g (SD, 3.28 g),: respectively; the peak-to-peak acceleration was 5.03 g (SD, 2.74 g) and 6.75 g (SD, 3.89 g). There were no significant differences (P > 0.05) between foot types. Conclusions. The calcaneal acceleration at heel strike for neutrally aligned and pes planus feet was not sensitive to foot type.
引用
收藏
页码:608 / 613
页数:6
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