The validity of forceplate data as a measure of rapid and targeted volitional movements of the centre of mass in transtibial prosthesis users.

Forceplate measures are valid in describing rapid, volitional movements in unilateral transtibial prosthesis users. Limits of stability outcomes extracted from center of pressure and center of mass are highly correlated, but can be sensitive to direction. Muscular reaction time correlates very little with reaction times extracted from the other variables. Implications for rehabilitation Rehabilitation programs utilizing limits of stability are valid measures of postural control in transtibial prosthesis users. Clinicians interpreting the outcomes from limits of stability need to be aware of their varying validity. Muscular reaction times correlate weakly with other measures of reaction time, highlighting the complexity of rapidly coordinating volitional movements in prosthesis users.