OBJECTIVE To determine if poorer gait variability and gait coordination among mobility limited older adults is related to their slower walking speed. DESIGN Cross-sectional analysis. . SETTING University research laboratory PARTICIPANTS: Community-dwelling adults aged > 68 years with (Short Physical Performance Battery score < 9; n=37) and without (n=32) mobility limitations INTERVENTIONS: Not applicable. MAIN OUTCOME MEASURES The variability of step length, swing time percent, and step width. Gait coordination was assessed along with the Phase Coordination Index. RESULTS The usual pace gait speed of those without mobility limitations was faster (1.22 ± 0.14 m/s vs. 0.71 ± 0.14 m/s; P < 0.001), and less variable in all gait characteristics (all P < 0.001), with the exception of step width (P = 0.185), than those with limitations. When those without limitations slowed their walking pace (0.71 m/s + 0.14), their gait coordination became poorer (P < 0.001) and the variability of all gait characteristics increased (all P < 0.001) except for step width, which decreased (P = 0.002). When those without mobility limitations walked at a slow pace, they had better gait coordination (P = 0.008) and less variable step length (P = 0.014) and swing time percent (P = 0.036). The variability of stride time (P = 0.260) and step width (P = 0.385), were not significantly different than that of their peers with limitations. CONCLUSIONS Increased variability in some gait characteristics of mobility limited older adults appears to be related to their slower walking speed. Gait coordination and the variability of step length and swing time percent may reflect intrinsic differences in mobility limited older adults that are independent of walking speed.

中文翻译：

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步行速度会影响有或没有行动不便的老年人的步态协调性和变异性


目的 确定行动不便的老年人步态变异性和步态协调性较差是否与步行速度较慢有关。设计横断面分析。 。地点 大学研究实验室 参与者：社区居住成年人，年龄 > 68 岁，有（短期身体表现电池评分 < 9；n=37）和没有（n=32）行动限制 干预措施：不适用。主要观察指标 步长、摆动时间百分比和步宽的变化。步态协调性与阶段协调指数一起进行评估。结果 没有活动限制的人通常的步态速度更快（1.22 ± 0.14 m/s vs. 0.71 ± 0.14 m/s；P < 0.001），并且所有步态特征的变化较小（所有 P < 0.001），除了步长之外（P = 0.185），与有限制的情况相比。当那些没有限制的人放慢步行速度（0.71 m/s + 0.14）时，他们的步态协调性变得更差（P < 0.001），所有步态特征的变异性增加（所有P < 0.001），但步宽除外，步宽下降（P = 0.002）。当那些没有行动限制的人慢速行走时，他们的步态协调性更好（P = 0.008），步长（P = 0.014）和摆动时间百分比（P = 0.036）的变化较小。步幅时间（P = 0.260）和步幅宽度（P = 0.385）的变化与有局限性的同龄人没有显着差异。结论 行动不便的老年人的一些步态特征的变异性增加似乎与他们的步行速度较慢有关。步态协调性以及步长和摆动时间百分比的变化可能反映了行动受限的老年人的内在差异，这些差异与步行速度无关。