Usami Kazuya, Aimoto Keita, Oyabu Miwa, Hashimoto Kakeru, Owaki Shunpei, Tozawa Nozomi, Kondo Izumi
Department of Rehabilitation Medicine, National Center for Geriatrics and Gerontology, Obu, Aichi, Japan.
Prog Rehabil Med. 2017 Jul 21;2:20170010. doi: 10.2490/prm.20170010. eCollection 2017.
The purpose of the present study was to describe a test to evaluate the maintenance of posture by measuring the inter-foot distance (IFD) during tandem stance.
The subjects were 38 young healthy volunteers (age 29 ± 6 years, 17 men). A three-dimensional motion analysis system and a split-belt treadmill were used to collect data. The subjects allowed their front leg to move across the front of their body according to the treadmill belt movement. The maximum IFD was defined as the IFD when either foot was removed from the treadmill belt while the subject maintained a standing posture. Measurements were made under four conditions: the dominant and non-dominant leg placed in front of the body and treadmill belt velocities of 0.5 and 1.0 km/h. Data were analyzed using two-way analysis of variance.
The normalized maximum IFD was 10-12% of subject height. There was no significant interaction between the front leg and the treadmill belt velocity (P=0.42). There was a significant main effect of the front leg on the normalized maximum IFD: the normalized maximum IFD was larger when the dominant foot was in front of the body than when the non-dominant foot was in front of the body (P=0.044). There was no significant main effect of the treadmill belt velocity on the normalized maximum IFD (P=0.97).
The normalized maximum IFD was significantly affected by which leg was placed in front.
本研究的目的是描述一种通过测量串联站立期间的双脚间距（IFD）来评估姿势维持的测试方法。
受试者为38名年轻健康志愿者（年龄29±6岁，17名男性）。使用三维运动分析系统和分体式跑步机收集数据。受试者让其前腿根据跑步机皮带的运动在身体前方移动。最大IFD定义为受试者保持站立姿势时任何一只脚从跑步机皮带上移开时的IFD。在四种条件下进行测量：优势腿和非优势腿置于身体前方，跑步机皮带速度分别为0.5 和1.0 km/h。使用双向方差分析对数据进行分析。
标准化最大IFD为受试者身高的10 - 12%。前腿与跑步机皮带速度之间无显著交互作用（P = 0.42）。前腿对标准化最大IFD有显著的主效应：当优势脚在身体前方时，标准化最大IFD大于非优势脚在身体前方时（P = 0.044）。跑步机皮带速度对标准化最大IFD无显著主效应（P = 0.97）。
标准化最大IFD受置于前方的腿的显著影响。
