Photo 2 (IMAGE) National University of Singapore Caption A side view of the insole which has a charging port. Within the insole are pressure sensors to track foot pressure and an inertial measurement unit sensor to measure changes in motion. Credit National University of Singapore Usage Restrictions NA License Original content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.