Center of Achievement, Department of Kinesiology, California State University, Northridge, Northridge, California.
Department of Kinesiology, University of Virginia, Charlottesville, Virginia.
Percept Mot Skills. 2021 Jun;128(3):988-1001. doi: 10.1177/0031512521993102. Epub 2021 Feb 10.
The primary purpose of this study was to compare biomechanical gait variables and perceived gait velocity between overground and treadmill walking conditions among typically developing children and adolescents. Twenty children and adolescents (age = 11.4, = 2.9 years) walked overground and on a treadmill at a matched comfortable walking speed while a 3-D motion analysis system captured spatiotemporal and kinematic gait parameters. In order to compare perceived gait velocities, we acquired data at self-selected comfortable and fastest walking speeds. Paired -tests comparing the children's speed and gait in these two different walking conditions revealed significantly higher cadence ( < .001) and shorter stride length ( < .002), during treadmill versus overground walking. In addition, treadmill walking showed statistically significant differences in joint kinematics of ankle excursion and pelvic rotation excursions ( < .001). Participants chose slower speeds on the treadmill than for overground walking when they were asked to select their comfortable and fastest walking speeds ( < .001). Our findings suggest that these differences between treadmill and overground walking in cadence, stride length, and perceived gait velocity should be considered whenever a treadmill is used for gait research within the pediatric population. However, the differences we found in gait kinematics between these two walking conditions appear to be relatively trivial and fell within the common error range of kinematic analysis.
本研究的主要目的是比较正常发育儿童和青少年在地面和跑步机行走条件下的生物力学步态变量和感知步行速度。20 名儿童和青少年（年龄=11.4，=2.9 岁）以匹配的舒适步行速度在地面和跑步机上行走，同时使用三维运动分析系统采集时空和运动学步态参数。为了比较感知步行速度，我们在自我选择的舒适和最快步行速度下采集数据。比较儿童在这两种不同行走条件下的速度和步态的配对检验显示，跑步机行走时的步频（<0.001）和步长（<0.002）显著更高。此外，跑步机行走在踝关节和骨盆旋转运动学的关节运动学方面表现出统计学上的显著差异（<0.001）。当要求参与者选择舒适和最快的步行速度时，他们在跑步机上选择的速度比在地面上慢（<0.001）。我们的研究结果表明，在进行儿科人群的步态研究时，应考虑跑步机和地面行走之间在步频、步长和感知步行速度方面的这些差异。然而，我们在这两种行走条件下的步态运动学中发现的差异似乎相对较小，且在运动学分析的常见误差范围内。
