The correct execution of exercises, such as squats and dead-lifts, is essential to prevent various bodily injuries. Existing solutions either rely on expensive motion tracking or multiple Inertial Measurement Units (IMU) systems require an extensive set-up and individual calibration. This project introduces a proof of concept, GymSoles, an insole prototype that provides feedback on the Centre of Pressure (CoP) at the feet to assist users with maintaining the correct body posture, while performing squats and dead-lifts. GymSoles was evaluated with 13 users in three conditions: 1) no feedback, 2) vibrotactile feedback, and 3) visual feedback. It has shown that solely providing feedback on the current CoP, results in a significantly improved body posture.


  • Don Samitha Elvitigala, Denys J.C Matthies, Loic David, Chamod Weerasinghe, Suranga Nanayakkara 2019. GymSoles: Improving Squats and Dead-Lifts by Visualizing the User’s Centre of Pressure. In CHI Conference on Human Factors in Computing Systems Proceedings (CHI 2019). May 4-9, 2019, Glasgow, Scotland, UK. (To appeare)