[19]. The whole system (insole and optical fiber sensors) has a total weight of only 150 g, which does not influence the natural pattern of the gait [19]. Moreover, the sensor data are sent to a host computer via Bluetooth, which enables high portability of the system along with high autonomy since the average power consumption is about 150 mA, indicating the possibility of using commercially available power banks for operation over about 10 hours. In order to verify the capabilities of the 3D-printed multiplexed insole, three analyses were performed, including plantar pressure mapping with the user standing on the insole, and the center of pressure (CoP) and ground reaction force (GRF) assessment during gait. The results are summarized in Fig. 4 and can be further verified in [17]. The plantar pressure mapping shows the possibility of estimating regions of abnormal pressure concentration as well as other abnormalities such as pronated and supinated feet. It is also worth noting that the integration of all 15 pressure measurement points resulted in the estimation of the users' body mass with errors lower than 3.4%. For the CoP assessment compared