An Analysis of Human Maximal Isometric Voluntary Plantar Flexion as a Function of Ankle and Knee Joint Angle

For obvious reasons direct measurement of muscle length force relationships are only rarely feasible for human muscles. Using models for calculating muscle force on the basis of muscle length and morphology validated for rat muscle, length force characteristics of human calf muscles were predicted (Huijing, 1985, Huijing et al. 1987).