The source code is developed by Dimitar Stanev (stanev@ece.upatras.gr) in the Visualization and Virtual Reality Group (VVR) as part of the publication "Dimitar Stanev and Konstantinos Moustakas, Stiffness Modulation of Redundant Musculoskeletal Systems, Journal of Biomechanics, vol. 85, pp. 101-107, Mar. 2019, DOI: https://doi.org/10.1016/j.jbiomech.2019.01.017". This work is licensed under a Creative Commons Attribution 4.0 International License.