We would like two asses postural sway using two Kistler force plates combined, so that the participant stays with one foot on each force plate. We need some advice on how to adapt our Matlab protocol. So far we have assesed postural sway using just one Kistler force plate and a Matlab protocol (Bey et al. 2018 "The data were acquired with the software BioWare 5.3.0.7 using a sampling rate of 200 Hz. The data were filtered using a 10th order digital low pass Butterworth filter at a 7 Hz cut-off frequency and analyzed with MATLAB (R2012a, 64 Bit, The Mathworks,Natick, USA)." Has anyone any idea what we need to do/how we need to change our Matlab protocol for a measurement with two force plates?