This dataset contains input and output data for the following journal article, where the relative accuracy of subject-specific muscle architecture from various MRI sequences for predicting muscle forces in musculoskeletal models is tested against those derived from generic, averaged data sets. Charles, JP., Grant, B., D' Août, K., Bates, K.T. (2020) Subject-specific muscle properties from diffusion tensor imaging significantly improve the accuracy of musculoskeletal models. J Anat. Please refer to README.txt for more information