In the quoted retrospective study (1), we used a quantified clinical measurement, the five-step assessment (an expansion of the Tardieu scale), that aims to quantify each of the neurological and the muscle disorders and distinguish them from one another as much as is clinically possible (2). We thus estimated muscle shortening and command impairment against key muscle groups of the lower and upper limbs, which led us to suggest a deleterious impact of structural muscle changes on the quality of the motor command in chronic stroke-induced hemiparesis.