“…Biomechanically, the mediolateral foot position relative to the horizontal location of the CoM WB established at foot-strike is the most important factor affecting the frontal plane whole-body balance during gait (Mackinnon & Winter, 1993). The larger MoS measured on the non-paretic side may indicate that post-stroke participants "overstepped" laterally with their non-paretic foot, to recover from the instability of the paretic side stance phase (Hendrickson et al, 2014;Kajrolkar & Bhatt, 2016;Nott et al, 2014). This "overstep" strategy used to improve dynamic stability could contribute to the observations reported in post-stroke individuals such as reduced walking velocity ( Figure A, supplementary materials), increased time spent on the non-paretic foot (Chen et al, 2005;Melzer et al, 2010;Olney & Richards, 1996;Patterson et al, 2008), increased lateral oscillations (Chen et al, 2005;De Bujanda et al, 2004;Hak et al, 2013;Melzer et al, 2010) and increased fatigability (Kuo, 2001).…”