Figure 2

Screenshots of the visual feedback. Exemplary screenshots of the special interface used as visual feedback during the rest (top) and work (bottom) phases of the squat exercise. Users can monitor in real-time the knee (L KNEE and R KNEE) and thorax (TRUNK vs S, lunge and squat exercises only) flexion angles via bar plots and numerical values, and the desired target range by the position of the blue arrows. They can also have access (top of the screen) to the countdown (in green) and the repetition (red).