People with chronic stroke (PwCS) demonstrate similar gait-slip fall-risk on both paretic and non-paretic side. Compensatory stepping and slipping limb control are crucial to reduce gait-slip fall-risk. Given the unpredictable intensities of real-life perturbations, this study aimed to determine whether recovery from paretic or non-paretic slips vary as a function of perturbation intensity among PwCS. Forty-four PwCS were assigned to non-paretic low intensity slip, non-paretic high intensity slip, paretic low intensity slip, or paretic high intensity slip group. Participants were subjected to a novel overground gait-slip with a distance of 24 cm (low) or 45 cm (high), under either limb. Recovery strategies, center of mass (CoM) state stability and slipping kinematics were analyzed. Both non-paretic high and low intensity groups demonstrated similar percentage of aborted and recovery stepping, however, paretic high intensity group demonstrated greater aborted stepping (p > 0.05). Both high and low intensity paretic slip groups demonstrated reduced post-slip CoM stability relative to the non-paretic slip groups (p < 0.05). Slip displacement was greater in paretic high group compared with non-paretic high group (p < 0.05). Greater slip displacement at higher intensity was noted only in paretic slip group (p < 0.05). The slip velocity was faster in paretic groups compared to non-paretic slip groups (p < 0.05). Paretic slips showed lower stability at both intensities associated with difficulty in modulating slipping kinematics and resorting to an increased aborted stepping strategy compared to non-paretic slip. These findings are suggestive of developing balance interventions for improving both compensatory non-paretic limb stepping and reactive control of slipping paretic limb for fall-risk reduction.

患有慢性卒中（PwCS）的人无论在坐骑还是非坐骑方面都表现出类似的步态滑倒风险。补偿性踩踏和滑倒肢体控制对于降低步态滑倒的跌落风险至关重要。考虑到现实生活中不可预测的扰动强度，本研究旨在确定在PwCS中，从表层滑移或非表层滑移的恢复是否随扰动强度而变化。将44个PwCS分配到非参数低强度滑移，非参数高强度滑移，参数低强度滑移或参数高强度滑移组。参与者在任一肢下进行了新型的地面步态滑行，滑行距离为24厘米（低）或45厘米（高）。分析了恢复策略，质心（CoM）状态稳定性和滑移运动学。非paretic高强度组和低强度组均显示出相似的流产和恢复脚步百分比，但是，paretic高强度组表现出较高的流产脚步（p> 0.05）。高强度和低强度腹股沟滑膜组均显示出滑移后CoM稳定性相对于非腹股沟滑膜组降低（p <0.05）。高偏瘫组的滑移较非偏瘫高组明显（p <0.05）。仅在paretic滑倒组中，在较高强度下出现更大的滑倒位移（p <0.05）。与非paretic滑移组相比，paretic组的滑移速度更快（p <0.05）。与非paretic滑移相比，paretic滑移在两种强度下都显示出较低的稳定性，这与调节滑移运动学和诉诸增加的中止踩踏策略有关。