The purpose of this study was to determine whether activation of muscles in the paretic leg, particularly contributing to propulsion, and gait symmetry can be improved by applying a targeted resistance force to the pelvis in the backward direction during stance phase while walking in individuals post-stroke. Thirteen individuals post-stroke participated in two experimental sessions, which consisted of treadmill walking, with either targeted or constant resistances, together with overground walking. For the targeted condition, a resistance force was applied to the pelvis during the stance phase of the paretic leg. For the constant condition, the resistance force was applied throughout the whole gait cycle. Participants showed greater increase in medial hamstring muscle activity in the paretic leg and improved step length symmetry after the removal of targeted resistance force, compared to effects of a constant resistance force (P < 0.03). In addition, treadmill walking with the targeted resistance induced more symmetrical step length during overground walking 10 min after the treadmill walking, compared to the result of the constant resistance force (P = 0.01). Applying a targeted resistance force to the pelvis during the stance phase of the paretic leg may induce an enhanced use of the paretic leg and an improvement in gait symmetry in individuals post-stroke. These results provide evidence showing that applying a targeted resistance to the pelvis may induce a forced use of the paretic leg during walking.

中文翻译：

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有针对性的骨盆约束力可在中风后的行走过程中增强对小腿的利用

这项研究的目的是确定在站立后行走阶段的个体行走过程中，向后方向施加有针对性的抵抗力到骨盆，是否可以改善前腿腿部肌肉的激活，特别是对推进的作用和步态对称性。中风。中风后有13个人参加了两次实验，包括有针对性或恒定抵抗力的跑步机行走以及地面行走。对于目标条件，在坐骨小腿的站立阶段，将阻力施加到骨盆。对于恒定条件，在整个步态周期中施加阻力。与恒定阻力（P <0.03）的效果相比，参与者显示出在腿部小腿内侧media肌活动的增加更大，并且在去除目标阻力后步长对称性得到了改善。此外，与恒定阻力（P = 0.01）的结果相比，具有目标阻力的跑步机行走在跑步机行走10分钟后的地面行走过程中诱导出更对称的步长。在中风后腿的站立阶段向骨盆施加有针对性的抵抗力可能会导致中风后腿的使用增加，步态对称性得到改善。这些结果提供了证据，表明对骨盆施加有针对性的抵抗力可能会导致步行过程中强迫使用模仿性腿。相比于恒定阻力的影响（P <0.03）。此外，与恒定阻力（P = 0.01）的结果相比，具有目标阻力的跑步机行走在跑步机行走10分钟后的地面行走过程中诱导出更对称的步长。在中风后腿的站立阶段向骨盆施加有针对性的抵抗力可能会导致中风后腿的使用增加，步态对称性得到改善。这些结果提供了证据，表明对骨盆施加有针对性的抵抗力可能会导致步行过程中强迫使用模仿性腿。相比于恒定阻力的影响（P <0.03）。此外，与恒定阻力（P = 0.01）的结果相比，具有目标阻力的跑步机行走在跑步机行走10分钟后的地面行走过程中诱导出更对称的步长。在中风后腿的站立阶段向骨盆施加有针对性的抵抗力可能会导致中风后腿的使用增加，步态对称性得到改善。这些结果提供了证据，表明对骨盆施加有针对性的抵抗力可能会导致步行过程中强迫使用模仿性腿。与恒定阻力的结果相比（P = 0.01）。在中风后腿的站立阶段向骨盆施加有针对性的抵抗力可能会导致中风后腿的使用增加，步态对称性得到改善。这些结果提供了证据，表明对骨盆施加有针对性的抵抗力可能会导致步行过程中强迫使用模仿性腿。与恒定阻力的结果相比（P = 0.01）。在中风后腿的站立阶段向骨盆施加有针对性的抵抗力可能会导致中风后腿的使用增加，步态对称性得到改善。这些结果提供了证据，表明对骨盆施加有针对性的抵抗力可能会导致步行过程中强迫使用模仿性腿。