Figure 1.

Gait retraining IMUs setup and feedback interface. (a) Gait retraining on a treadmill with IMUs positioned on the participant’s paretic lower limb. (b) Feedback interface. Left panel: extension period; right panel: flexion period. Needle positions in the upper half of the interface indicate the performed pattern is overall more flexed than the target, while positions in the lower half indicate a more extended pattern. The red tick marks delimit the maximum range. Motivation to respond to the feedback is provided by the awarding of points added to a cumulative score, with one, two, three points respectively in the outer, middle, and inner colored sectors.