Fig. 5

Definition of the stimulation sequences for the 2PD and SD assessments, during walking (a) and sitting (b). The parameter \(\Delta {T}_{GCT}\) denotes the duration of the gait cycle. As in the amplitude perception assessment, the stimulation activation and deactivation were triggered by the gait events during walking, whereas during sitting, the times were predefined and corresponded to those measured beforehand during walking (see "Preparation"). FSR 1 and 2 are the two force-sensing resistors placed on the foot sole