Body size differences in vertical and leg stiffness in running humans

Few studies to date have examined the scaling of gait parameters with respect to body mass in humans of varying body sizes. This study examined how vertical and leg stiffness scale in 40 healthy adults. We calculated scaling exponents for vertical and leg stiffness from kinematic and kinetic data using log-log regressions with 95% confidence intervals. In this sample, all variables scaled to the isometric expectations and scaled proportionally with body mass.