PDF(Pubmed)
Abstract：
Locomotor and balance disorders are major limitations for subjects with hemiparesis. The Timed Up and Go (TUG) test is a complex navigational task involving oriented walking and obstacle circumvention. We hypothesized that subjects with hemiparesis adopt a cautious gait during complex locomotor tasks. The primary aim was to compare spatio-temporal gait parameters, indicators of cautious gait, between the locomotor subtasks of the TUG (Go, Turn, Return) and a Straight-line walk in people with hemiparesis. Our secondary aim was to analyze the relationships between TUG performance and balance measures, compare spatio-temporal gait parameters between fallers and non-fallers, and identify the biomechanical determinants of TUG performance. Biomechanical parameters during the TUG and Straight-line walk were analyzed using a motion capture system. A repeated measures ANOVA and two stepwise ascending multiple regressions (with performance variables and biomechanical variables) were conducted. Gait speed, step length, and % single support phase (SSP) of the 29 participants were reduced during Turn compared to Go and Return and the Straight-line walk, and step width and % double support phase were increased. TUG performance was related to several balance measures. Turn performance (R2 = 63%) and Turn trajectory deviation followed by % SSP on the paretic side and the vertical center of mass velocity during Go (R2 = 71%) determined TUG performance time. People with hemiparesis adopt a cautious gait during complex navigation at the expense of performance.
摘要：
运动和平衡障碍是偏瘫受试者的主要限制。定时上行（TUG）测试是一项复杂的导航任务，涉及定向步行和障碍规避。我们假设偏瘫患者在复杂的运动任务中采取谨慎的步态。主要目的是比较时空步态参数，谨慎步态的指标，在TUG的运动子任务之间(Go，转身,返回）和偏瘫患者的直线步行。我们的次要目的是分析TUG绩效与平衡指标之间的关系，比较跌倒者和非跌倒者的时空步态参数，并确定TUG性能的生物力学决定因素。使用运动捕获系统分析了TUG和直线步行过程中的生物力学参数。进行了重复测量ANOVA和两个逐步上升的多元回归（具有性能变量和生物力学变量）。步态速度,步长,与GoandReturn和直线步行相比，Turn期间29名参与者的单支持阶段（SSP）减少了％，台阶宽度和%双支撑相增加。TUG性能与几种平衡措施有关。转弯性能（R2=63％）和转弯轨迹偏差，然后是侧面的％SSP和Go期间的垂直质心速度（R2=71％）确定了TUG性能时间。偏瘫患者在复杂的导航过程中采取谨慎的步态，以牺牲性能为代价。
