Grindle Daniel M, Baker Lauren, Furr Mike, Puterio Tim, Knarr Brian, Higginson Jill
1 University of Delaware.
2 University of Nebraska Omaha.
J Appl Biomech. 2018 Oct 1;34(5):349-353. doi: 10.1123/jab.2017-0124. Epub 2018 Oct 4.
Prolonged sitting has been associated with negative health effects. Walking workstations have become increasingly popular in the workplace. There is a lack of research on the biomechanical effect of walking workstations. This study analyzed whether walking while working alters normal gait patterns. A total of 9 participants completed 4 walking trials at 2.4 and 4.0 km·h: baseline walking condition, walking while performing a math task, a reading task, and a typing task. Biomechanical data were collected using standard motion capture procedures. The first maximum vertical ground reaction force, stride width, stride length, minimum toe clearance, peak swing hip abduction and flexion angles, peak swing and stance ankle dorsiflexion, and knee flexion angles were analyzed. Differences between conditions were evaluated using analysis of variance tests with Bonferroni correction (P ≤ .05). Stride width decreased during the reading task at both speeds. Although other parameters exhibited significant differences when multitasking, these changes were within the normal range of gait variability. It appears that for short periods, walking workstations do not negatively impact gait in healthy young adults.
长时间坐着已被证明对健康有负面影响。步行工作站在工作场所越来越受欢迎。目前缺乏关于步行工作站生物力学效应的研究。本研究分析了工作时行走是否会改变正常步态模式。共有9名参与者以2.4和4.0千米/小时的速度完成了4次步行试验：基线步行状态、在进行数学任务、阅读任务和打字任务时行走。使用标准动作捕捉程序收集生物力学数据。分析了首次最大垂直地面反作用力、步幅宽度、步幅长度、最小脚趾间隙、摆动期峰值髋外展和屈曲角度、摆动期和站立期峰值踝关节背屈以及膝关节屈曲角度。使用经Bonferroni校正的方差分析检验评估不同状态之间的差异（P≤0.05）。在两种速度下的阅读任务期间，步幅宽度均减小。尽管在多任务处理时其他参数表现出显著差异，但这些变化仍在步态变异性的正常范围内。看来，对于健康的年轻人来说，短时间使用步行工作站不会对步态产生负面影响。
