2.3.2. Sensewear Armband

A multisensor array (Sensewear Armband, Body Media, Pittsburgh, PA, USA) was positioned on the back of the participant's arm, midway between the shoulder and elbow. It measures 7 cm × 7 cm × 2 cm and weighs 55 g. It gathers raw physiological data of movements using a biaxial accelerometer and records heat flux, skin temperature, and galvanic skin response. Cycles of 1 s were used in this study, i.e., accelerations were integrated over 1-s periods to produce a number of counts for each second, which was written into the internal memory. No specific filtering was used. At the end of each trial, the stored Sensewear Armband data were downloaded to a personal computer for analysis using the reader interface unit supplied by the manufacturer. We used the step count estimate provided by Sensewear Armband for our work. We chose to place the devices on the affected and unaffected arm to judge the impact of the impairments of the estimations of the sensor. The sensor was attached to the arm by an elastic band provided by the manufacturer.
