Effects of interventions on normalizing step width during self-paced dual-belt treadmill walking with virtual reality, a randomised controlled trial
Effects of interventions on normalizing step width during self-paced dual-belt treadmill walking with virtual reality, a randomised controlled trial
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DOI：
10.1016/j.gaitpost.2017.07.040
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发表时间：
2017-10-01
期刊：
影响因子：
2.4
通讯作者：
Hijmans, J. M.
中科院分区：
文献类型：
--
作者：
Lansink, I. L. B. Oude;van Kouwenhove, L.;Hijmans, J. M.
背景：在双腰带跑步机步行时，在虚拟现实的自定步速模式下，步幅会增加。目的：本随机研究的目的是分析两种干预措施对台阶宽度的影响，以缩短熟悉时间。方法：我们使用GRAIL(步态实时分析交互实验室)，这是一种双腰带跑步机，在自定步速模式下具有虚拟现实功能。30名健康青年被随机分成三组，要求他们以自己喜欢的速度步行5分钟。在第一阶段，控制组没有接受任何干预，线上行走组被指示走在一条线上，投影在跑步机的带间间隙上，反馈组收到关于他们当前步幅的反馈，并被要求减少步幅。干预从1min开始，持续1min。结果：线性混合建模结果显示，干预1结束后，干预对步宽没有影响。会议1的初始步宽(秒30 S)大于会议2的初始步宽。2min后步宽恢复正常，1min后步宽的变化趋于稳定。解释：干预结束后，干预不会减少步宽。在健康的年轻人中，无论采取何种干预措施，2分钟的熟悉时间就足以使步幅正常化并稳定下来。没有必要进行标准化干预以使台阶宽度正常化。
Background: Step width is increased during dual-belt treadmill walking, in self-paced mode with virtual reality. Generally a familiarization period is thought to be necessary to normalize step width.Aim: The aim of this randomised study was to analyze the effects of two interventions on step width, to reduce the familiarization period.Methods: We used the GRAIL (Gait Real-time Analysis Interactive Lab), a dual-belt treadmill with virtual reality in the self-paced mode. Thirty healthy young adults were randomly allocated to three groups and asked to walk at their preferred speed for 5 min. In the first session, the control-group received no intervention, the 'walk-on-the-line'-group was instructed to walk on a line, projected on the between-belt gap of the treadmill and the feedback-group received feedback about their current step width and were asked to reduce it. Interventions started after 1 min and lasted 1 min. During the second session, 7-10 days later, no interventions were given.Findings: Linear mixed modeling showed that interventions did not have an effect on step width after the intervention period in session 1. Initial step width (second 30 s) of session 1 was larger than initial step width of session 2. Step width normalized after 2 min and variation in step width stabilized after 1 min.Interpretation: Interventions do not reduce step width after intervention period. A 2-min familiarization period is sufficient to normalize and stabilize step width, in healthy young adults, regardless of interventions. A standardized intervention to normalize step width is not necessary.