Calcaneal loading during walking and running
Calcaneal loading during walking and running
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DOI：
10.1097/00005768-200003000-00012
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发表时间：
2000-03-01
期刊：
影响因子：
--
通讯作者：
Carter, DR
中科院分区：
文献类型：
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作者：
Giddings, VL;Beaupré, GS;Carter, DR
目的：这项研究的脚使用实验测量的运动学和动力学数据与数值模型，以评估在步行和跑步过程中在体内跟骨应力。研究方法：外部地面反作用力（GRF）和运动学数据进行了测量，在步行和跑步过程中使用放射线摄影和测力板测量。一个接触耦合有限元模型的脚被开发来评估的力量作用在跟骨步态。结果如下：我们发现，计算的力-时间曲线的关节接触，韧带，跟腱的力量与时间的变化曲线的时刻约踝关节。该模型预测的峰值距跟骨和跟骰关节负荷5.4和4.2体重（BW）在步行和11.1和7.9 BW在运行期间。行走和跑步时的最大预测跟腱力分别为3.9和7.7 BW。结论：大幅度的力量和跟骨应力产生后期的立场阶段，最大负载发生在类似的70%的立场阶段在步行过程中，并在类似的60%的立场阶段在运行过程中，步态速度分析。在步行和跑步过程中，主应力的轨迹相互对应，并且定性地与跟骨小梁结构相对应。
Purpose: This study of the foot uses experimentally measured kinematic and kinetic data with a numerical model to evaluate in vivo calcaneal stresses during walking and running. Methods: External ground reaction forces (GRF) and kinematic data were measured during walking and running using cineradiography and force plate measurements. A contact-coupled finite element model of the foot was developed to assess the forces acting on the calcaneus during gait. Results: We found that the calculated force-time profiles of the joint contact, ligament, and Achilles tendon forces varied with the time-history curve of the moment about the ankle joint. The model predicted peak talocalcaneal and calcaneocuboid joint loads of 5.4 and 4.2 body weights (BW) during walking and 11.1 and 7.9 BW during running. The maximum predicted Achilles tendon forces were 3.9 and 7.7 BW for walking and running. Conclusions: Large magnitude forces and calcaneal stresses are generated late in the stance phase, with maximum loads occurring at similar to 70% of the stance phase during walking and at similar to 60% of the stance phase during running, for the gait velocities analyzed. The trajectories of the principal stresses, during both walking and running, corresponded to each other and qualitatively to the calcaneal trabecular architecture.