Gimmon Yoav, Rashad Hisham, Kurz Ilan, Plotnik Meir, Riemer Raziel, Debi Ronen, Shapiro Amir, Melzer Itshak
J Aging Phys Act. 2018 Jul 1;26(3):382-389. doi: 10.1123/japa.2017-0120. Epub 2018 Jun 7.
Human gait is symmetric and bilaterally coordinated in young healthy persons. In this study, we aimed to explore the differences in bilateral coordination of gait as measured by the phase coordination index (PCI), gait asymmetry, and stride time variability of gait between four age groups. A total of 44 older adults were recruited: nine young-old (age 70-74 years), 26 old (age 75-84 years), nine old-old (>85 years and older), and 13 young adults (age 20-30 years). Subjects walked on a treadmill; walking speed was systematically increased from 0.5 to 0.9 m/s in steps of 0.1 m/s. There were marginal effects of age on PCI, significant main effects of walking speeds without interaction between walking speeds and age group. A difference in PCI could distinguish between young's and late aging group, and only during their preferred treadmills walking speed. This study explicitly shows that bilateral coordination of walking is modified by gait speed, and deteriorates only at a very old age.
在年轻健康人群中，人类步态是对称且双侧协调的。在本研究中，我们旨在探讨四个年龄组之间通过相位协调指数（PCI）、步态不对称性和步态步幅时间变异性测量的步态双侧协调性差异。总共招募了44名老年人：9名年轻老年人（70 - 74岁）、26名老年人（75 - 84岁）、9名高龄老年人（85岁及以上）和13名年轻人（20 - 30岁）。受试者在跑步机上行走；行走速度以0.1 m/s的步长从0.5 m/s系统地增加到0.9 m/s。年龄对PCI有边际效应，行走速度有显著主效应，且行走速度与年龄组之间无交互作用。PCI的差异可以区分年轻人和老龄组，且仅在他们偏好的跑步机行走速度时。本研究明确表明，步行的双侧协调性会因步态速度而改变，并且仅在非常老龄时才会恶化。
