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Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
Schematic representation of: (a) Foot plantar area designation and sensing points distribution and (b) polymer optical fiber Bragg gratings (POFBG)-embedded cork insole. (c) Photograph of the POFBGs array embedded in the cork insole. (d) A zoom-in image of one sensing element.