Walking speed and spatiotemporal step mean measures are reliable during feedback-controlled treadmill walking; however, spatiotemporal step variability is not reliable
Walking speed and spatiotemporal step mean measures are reliable during feedback-controlled treadmill walking; however, spatiotemporal step variability is not reliable
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DOI：
10.1016/j.jbiomech.2018.11.051
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发表时间：
2019-01-23
影响因子：
2.4
通讯作者：
Yentes, Jennifer M.
中科院分区：
文献类型：
--
作者：
Wiens, Casey;Denton, William;Yentes, Jennifer M.
本研究的目的是比较反馈控制的跑步机（FeedbackTM）的影响，传统的定速跑步机（FixedTM）的时空步态的手段，变异性和动力学。该研究还检查了使用FeedbackTM时的会话间可靠性。10名年轻人在FeedbackTM上进行了5分钟的熟悉，然后进行了16分钟的实验性试验。他们在一周内返回并完成了5分钟的熟悉，然后分别针对FeedbackTM和FixedTM条件进行了16分钟的实验试验。从所有实验条件计算平均步行速度和步行时间、长度、宽度和速度平均值和变异系数。步时间，长度，宽度和速度步态动力学进行了分析，使用去趋势波动分析。使用ANOVA确定实验试验之间的平均差异，并通过组内相关系数确定FeedbackTM会话之间的可靠性。没有发现差异，平均步行速度也没有时空变量，除了步宽，实验试验之间。所有平均时空变量在会话之间表现出良好的可靠性，而变异系数不可靠。步时间，长度，宽度和速度的步态动态显着更持久的FeedbackTM条件相比，固定TM，尤其是步速度。然而，步态动力学表现出公平之间的FeedbackTM会话的可靠性差。在FeedbackTM上行走时，用户保持一致的设定点，但与在FixedTM上行走相比，平均值附近的步态动力学是不同的。此外，当使用FeedbackTM时，时空步态动力学和可变性在不同的日子可能不一致。(C)2018爱思唯尔有限公司版权所有。
The purpose of the study was to compare the effects of a feedback-controlled treadmill (FeedbackTM) to a traditional fixed-speed treadmill (FixedTM) on spatiotemporal gait means, variability, and dynamics. The study also examined inter-session reliability when using the FeedbackTM. Ten young adults walked on the FeedbackTM for a 5-minute familiarization followed by a 16-minute experimental trial. They returned within one week and completed a 5-minute familiarization followed by a 16-minute experimental trial each for FeedbackTM and FixedTM conditions. Mean walking speed and step time, length, width, and speed means and coefficient of variation were calculated from all experimental conditions. Step time, length, width, and speed gait dynamics were analyzed using detrended fluctuation analysis. Mean differences between experimental trials were determined using ANOVAs and reliability between FeedbackTM sessions was determined by intraclass correlation coefficient. No difference was found in mean walking speed nor spatiotemporal variables, with the exception of step width, between the experimental trials. All mean spatiotemporal variables demonstrated good to excellent reliability between sessions, while coefficient of variation was not reliable. Gait dynamics of step time, length, width, and speed were significantly more persistent during the FeedbackTM condition compared to FixedTM, especially step speed. However, gait dynamics demonstrated fair to poor reliability between FeedbackTM sessions. When walking on the FeedbackTM, users maintain a consistent set point, yet the gait dynamics around the mean are different when compared to walking on a FixedTM. In addition, spatiotemporal gait dynamics and variability may not be consistent across separate days when using the FeedbackTM. (C) 2018 Elsevier Ltd. All rights reserved.