Prosthetic foot stiffness has been recognized as an important factor in optimizing the walking performance of amputees [1-3]. Commercial feet are available in a range of stiffness categories and geometries. The stiffness of linear displacements of the hindfoot and forefoot for several commercially available feet have been reported to be within a range of 27-68 N/mm [4] and 28-76 N/mm [5], respectively, but these values are most relevant only to the earliest and latest portions of stance phase, when linear compression or rebound naturally occur. In contrast, mid-stance kinetics are more related to the angular stiffness of the foot, which describes the ankle torque produced by angular progression of the lower limb over the foot during this phase. Little data is available regarding the angular stiffness of any commercially available feet.
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机译：假肢刚度已经被认为是优化癫痫的步行性能的重要因素[1-3]。商业脚可在一系列刚度类别和几何形状中提供。据报道，在几种市售脚的后脚和前掌的线性位移的刚度分别在27-68N / mm [4]和28-76n / mm [5]的范围内，但这些值是最重要的是最早和最近的姿势阶段，当线性压缩或反弹自然发生时。相反，中间姿势动力学与脚的角刚度更有关，这描述了在该阶段期间脚下的下肢角度进展产生的脚踝扭矩。关于任何市售脚的角度刚度的少数数据都可以提供。
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