Abstract
The algorithm of rigid body spring models (RBSM) is improved by adding an iteration process, with loading muscle force representing the external force, like a load incremant model.
Using such an algorithm, muscle force can be input into computer analyses of human joint mechanics. This methood also means that the center of the femoral head does not need to be assumed. Moreover, changes in pressure distribution do not occur abductor muscle spring constant. This new method may be useful in evaluating muscular systems.
