A: Locomotor H-reflex (mean±SD) in DC participants in whom the H-reflex decreased significantly (N=6, left) and NS participants (N=6, right) before and after 30 conditioning or control sessions. The step cycle is divided into 12 equal bins, starting from foot contact. Thus, bins 1–7 are for the stance phase and bins 8–12 are for the swing phase. In DC participants, H-reflex decreased in the swing phase and also in the stance phase. Such decreases were not present in NS participants. B: H-reflex in the mid-late swing phase (i.e., bins 10–12, highlighted in A) measured before and after 30 conditioning or control sessions. An asterisk indicates a significant difference (p<0.05, t-test) from the baseline value (left) or between the measurements (right).