A comparison of variability in spatiotemporal gait parameters between treadmill and overground walking conditions
A comparison of variability in spatiotemporal gait parameters between treadmill and overground walking conditions
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DOI：
10.1016/j.gaitpost.2015.09.024
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发表时间：
2016-01-01
期刊：
影响因子：
2.4
通讯作者：
Ness, Debra K.
中科院分区：
文献类型：
--
作者：
Hollman, John H.;Watkins, Molly K.;Ness, Debra K.
电动跑步机通常用于人类行走的生物力学和临床研究。然而，跑步机行走是否会引起与地上行走相同的运动反应，这一点尚不明确。本研究的目的是检查在跑步机和地上行走时下肢和躯干的时空步态参数的差异，使用平均值和变异值的比较。20名健康参与者（年龄23.8 ± 1.2岁）在跑步机上和地上行走6分钟，同时佩戴APDM 6 Opal惯性监测仪。测量了步幅、步幅时间、步速、步频、站立相百分比以及峰值矢状面和额状面躯干速度。使用Poincare分析计算每个参数的平均值以及短期（SD 1）和长期变异性（SD 2）估计值。采用配对t检验（α = 0.05）比较地上和跑步机行走条件下的平均值、SD 1和SD 2值，并使用Cohen d统计量进行效应量估计。在跑步机和地上行走之间，每个步态参数的平均值在统计学上是相等的（p > 0.05）。与地上行走相比，在跑步机上代表短期和长期变异性的SD 1和SD 2值显著降低（p < 0.05）。这证明了在将跑步机用于研究或临床目的时考虑步态变异性的重要性。跑步机训练可能会诱导不变的步态模式，造成难以将在跑步机上获得的运动技能转化为地上行走条件。(C)2015 Elsevier B.V.版权所有。
Motorized treadmills are commonly used in biomechanical and clinical studies of human walking. Whether treadmill walking induces identical motor responses to overground walking, however, is equivocal. The purpose of this study was to examine differences in the spatiotemporal gait parameters of the lower extremities and trunk during treadmill and overground walking using comparison of mean and variability values. Twenty healthy participants (age 23.8 +/- 1.2 years) walked for 6 min on a treadmill and overground while wearing APDM 6 Opal inertial monitors. Stride length, stride time, stride velocity, cadence, stance phase percentage, and peak sagittal and frontal plane trunk velocities were measured. Mean values were calculated for each parameter as well as estimates of short- (SD1) and long-term variability (SD2) using Poincare analyses. The mean, SD1, and SD2 values were compared between overground and treadmill walking conditions with paired t-tests (alpha = 0.05) and with effect size estimates using Cohen's d statistic. Mean values for each of the gait parameters were statistically equivalent between treadmill and overground walking (p > 0.05). The SD1 and SD2 values representing short-and long-term variability were considerably reduced (p < 0.05) on the treadmill as compared to overground walking. This demonstrates the importance of consideration of gait variability when using treadmills for research or clinical purposes. Treadmill training may induce invariant gait patterns, posing difficulty in translating locomotor skills gained on a treadmill to overground walking conditions. (C) 2015 Elsevier B.V. All rights reserved.