Nigg B M, Anton M
Human Performance Laboratory, University of Calgary, Alberta, Canada.
Med Sci Sports Exerc. 1995 Jan;27(1):92-7.
The purpose of this project was to determine the effect of changes in stiffness and viscosity of the foot ground interface on the work performed during locomotion. The estimation of the work during locomotion was derived from a mathematical two segment model, representing the foot and the rest of the body. The typical passive elements between the foot and the rest of the body were replaced by a strategic formulation of how a resultant force, F, representing the net effect of all the muscles between the foot and the rest of the body, has to evolve over time in a running situation. The calculations were performed under the assumption that the force F is selected so that the mechanical work performed by F is minimal. The estimations of the work required during a step cycle is generally higher for softer than for harder springs and for low damping compared with high damping. The model calculations demonstrate that specific combinations of material properties may be advantageous or disadvantageous from an energy point of view.
本项目的目的是确定足部与地面界面的刚度和粘度变化对运动过程中所做的功的影响。运动过程中功的估计值来自一个数学双段模型，该模型代表足部和身体的其他部分。足部与身体其他部分之间典型的被动元件被一种策略性公式所取代，该公式描述了代表足部与身体其他部分之间所有肌肉净效应的合力F在跑步情况下必须如何随时间演变。计算是在这样的假设下进行的，即选择力F以使F所做的机械功最小。与高阻尼相比，对于较软的弹簧和低阻尼，步周期所需功的估计值通常更高。模型计算表明，从能量角度来看，材料特性的特定组合可能有利也可能不利。
