Data and OpenSim results files are shared in this repository. The corresponding author, Bart van Veen (bvanveen [at] outlook.com), can be contacted for enquiries or to obtain relevant pieces of MATLAB code. The data for the four models are stored in separate folders. The following files can be found in this folder: .txt files with a list of names of the bodies, coordinates, joints, movement directions, muscles and resserve/residual actuators. .osim file: the opensim model .xml file: the residual actuators A subfolder 'OSsimulations' which contains all the opensim simulation results files + c3d, trc (marker trajectories) and mot (ground reaction force) data. Each trial is organized in a separate subfolder. Additional figures are provided in the supplementary material (.docx file).