Shanghai University of Sport.
Shandong Institute of Sport Science.
Motor Control. 2020 Jan 1;24(1):113-126. doi: 10.1123/mc.2018-0113.
Daily stair activities have become increasingly challenging for older adults with deterioration in physical and cognitive capabilities. However, the dynamic stability of older adults during stair descent under a concurrent dual-task condition remains undetermined. The gait and dynamic stability variables of 40 healthy older adults were measured under single- and dual-task conditions during stair descent. The step length, step width, and single support time did not significantly increase (p > .05) under the dual-task condition during stair descent. The medial-lateral center of mass velocity significantly increased (p < .003), whereas the medial-lateral margin of dynamic stability value significantly decreased (p < .006) at the landing and initial single support under the dual-task condition during stair descent. The self-regulatory ability of healthy older adults under the dual-task condition during stair descent was underestimated. Dual tasking displayed a positive impact on the anterior-posterior dynamic stability of healthy older adults.
日常楼梯活动对于身体和认知能力下降的老年人来说变得越来越具有挑战性。然而，在同时进行双重任务的情况下，老年人在楼梯下降过程中的动态稳定性仍不确定。在楼梯下降过程中，对 40 名健康老年人在单任务和双任务条件下的步态和动态稳定性变量进行了测量。在双任务条件下，步长、步宽和单支撑时间没有显著增加（p >.05）。在双任务条件下，着陆和初始单支撑时的质心速度的横向明显增加（p <.003），而动态稳定性值的横向范围显著减小（p <.006）。健康老年人在楼梯下降时进行双任务的自我调节能力被低估了。双重任务对健康老年人的前后向动态稳定性有积极影响。
