Older adults utilize less efficient postural control when performing pushing task.
Older adults utilize less efficient postural control when performing pushing task.
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DOI：
10.1016/j.jelekin.2015.09.002
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发表时间：
2015-12
期刊：
影响因子：
--
通讯作者：
Aruin AS
中科院分区：
文献类型：
--
作者：
Lee YJ;Chen B;Aruin AS
保持平衡的能力随着年龄的增长而下降。目的是调查年龄的作用，在推动一个物体的预期（阿帕）和补偿（CPA）的姿势调整的一代。老年人（68.8 ± 1.0岁）和年轻人（30.1 ± 1.4岁）参与了用双手推动物体（连接到天花板上的钟摆）的实验。在阿帕和CPA阶段，记录并分析了6个腿部和躯干肌肉的电活动和压力中心（COP）的位移。测定了起效时间、肌肉活动积分和COP位移。此外，还计算了小腿、大腿和躯干段肌肉的协同激活和相互激活指数。与年轻人相比，老年人的姿势控制效率较低，表现为预期肌肉起始时间延迟和COP位移延迟。此外，老年人在CPA阶段使用肌肉的共同激活，而年轻的受试者利用肌肉的相互激活。在老年人中观察到的预期和补偿性姿势调整过程中观察到的姿势控制效率降低可能使他们在执行涉及推动的任务时容易发生福尔斯。研究结果为未来研究老年人日常活动的优化提供了背景。
The ability to maintain balance deteriorates with increasing age. The aim was to investigate the role of age in generation of anticipatory (APA) and compensatory (CPA) postural adjustments during pushing an object. Older (68.8 ± 1.0 years) and young adults (30.1 ± 1.4 years) participated in the experiment involving pushing an object (a pendulum attached to the ceiling) using both hands. Electrical activity of six leg and trunk muscles and displacements of the center of pressure (COP) were recorded and analyzed during the APA and CPA phases. The onset time, integrals of muscle activity, and COP displacements were determined. In addition, the indexes of co-activation and reciprocal activation of muscles for the shank, thigh, and trunk segments were calculated. Older adults, compared to young adults, showed less efficient postural control seen as delayed anticipatory muscle onset times and delayed COP displacements. Moreover, older adults used co-activation of muscles during the CPA phase while younger subjects utilized reciprocal activation of muscles. The observed diminished efficiency of postural control during both anticipatory and compensatory postural adjustments observed in older adults might predispose them to falls while performing tasks involving pushing. The outcome provides a background for future studies focused on the optimization of the daily activities of older adults.