A kinematic and kinetic comparison of overground and treadmill walking in healthy subjects
A kinematic and kinetic comparison of overground and treadmill walking in healthy subjects
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DOI：
10.1016/j.gaitpost.2006.07.003
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发表时间：
2007-06-01
期刊：
影响因子：
2.4
通讯作者：
Kerrigan, D. Casey
中科院分区：
文献类型：
--
作者：
Riley, Patrick O.;Paolini, Gabriele;Kerrigan, D. Casey
在不久的将来，使用仪器跑步机的步态评估方案将越来越多地使用。因此，必须表明，使用仪器化的跑步机将产生足以进行反向动力学分析的地面反作用力测量，并且必须很好地表征跑步机和地上步态之间的差异。方法：以受试者自行选择的舒适步行速度进行地面步行动力学评估。在跑步机步态试验中，受试者在两台跑步机上行走，在前进的跑步机上脚跟着地，在后面的跑步机上脚趾着地。跑步机设定为平均地面行走速度。使用Vicon插件步态评估地面和跑步机数据。评估了地上和跑步机步态的运动学和动力学参数的最大值和最小值之间的差异。结果：跑步机步态与地上步态的运动学特征非常相似。22个运动学参数最大值中有12个差异有统计学意义（p < 0.05），但差异幅度一般小于2度。与地面步态相比，所有的GRF最大值在统计学上都要小得多（p < 0.05）， 18个力矩中的15个和6个功率最大值中的3个也是如此。然而，差异的大小与正常步态参数的可变性相当。矢状面踝关节力矩在跑步机和地上步态中无统计学差异。讨论：我们已经表明，跑步机步态在质量和数量上与地上步态相似。运动学和动力学参数的差异可以在匹配的比较中检测到，特别是在动力学参数的情况下。然而，这些差异的大小都在测量运动学参数的可重复性范围内。因此，跑步机和地面步态的机制非常相似。临床意义：已经证明了跑步机和地上步态的本质等效性，现在可以利用基于跑步机的方案进行临床运动分析。(C) 2006 Elsevier B.V.版权所有
Introduction: Gait evaluation protocols using instrumented treadmills will be increasingly used in the near future. For this reason, it must be shown that using instrumented treadmills will produce measures of the ground reaction force adequate for inverse dynamic analysis, and differences between treadmill and overground gait must be well characterized.Methods: Overground walking kinetics were estimated with the subjects walking at their self-selected comfortable walking speed. For the treadmill gait trials, the subjects walked on two treadmills, such that heel-strike occurred on the forward treadmill and toe-off occurred on the trailing treadmill. The treadmill was set to the average overground walking speed. Overground and treadmill data were evaluated using Vicon Plug-in Gait. The differences between the maxima and minima of kinematic and kinetic parameters for overground and treadmill gait were evaluated.Results: The kinematics of treadmill and overground gait were very similar. Twelve of 22 kinematic parameter maxima were statistically significantly different (p < 0.05), but the magnitude of the difference was generally less than 2 degrees. All GRF maxima were found to be statistically significantly smaller for treadmill versus overground gait (p < 0.05) as were 15 of 18 moment, and 3 of 6 power maxima. However, the magnitude of the differences was comparable to the variability in normal gait parameters. The sagittal plane ankle moments were not statistically different for treadmill and overground gait.Discussion: We have shown that treadmill gait is qualitatively and quantitatively similar to overground gait. Differences in kinematic and kinetic parameters can be detected in matched comparisons, particularly in the case of kinetic parameters. However, the magnitudes of these differences are all within the range of repeatability of measured kinematic parameters. Thus, the mechanics of treadmill and overground gait are very similar. Clinical significance: Having demonstrated the essential equivalence of treadmill and overground gait, it is now possible for clinical movement analysis to take advantage of treadmill-based protocols. (C) 2006 Elsevier B.V. All rights reserved.