Minetti A E
Reparto di Fisiologia, Istituto Tecnologie Biomediche Avanzate, C.N.R., Segrate MI, Italy.
J Biomech. 1998 May;31(5):463-8. doi: 10.1016/s0021-9290(98)00038-4.
By refining a previously published model, a simple equation for the estimation of the mechanical internal work during locomotion is presented. The only input variables are the progression speed, the stride frequency and the duty factor, i.e. the fraction of the stride duration at which a foot is in contact with the ground. The inclusion of this last variable, easily measurable, allows to obtain a single equation for both walking and running. The model predictions have been compared with the mechanical internal work experimentally obtained on humans in several conditions: speeds (range 0.8-3.3 m s(-1)), gaits (walking and running) and gradients (+/-15%). The close match between the two indicates that the model equation can be used whenever a direct measurement of the mechanical internal work is unavailable.
通过完善先前发表的模型，提出了一个用于估算运动过程中机械内功的简单方程。唯一的输入变量是行进速度、步频和占空因数，即一只脚与地面接触的步长时间占比。包含这个易于测量的最后一个变量后，就可以得到一个适用于步行和跑步的单一方程。该模型预测结果已与在多种条件下（速度范围为0.8 - 3.3米/秒、步态为步行和跑步、坡度为±15%）对人体实验获得的机械内功进行了比较。两者之间的紧密匹配表明，当无法直接测量机械内功时，可以使用该模型方程。
