CIAMS, Université Paris-Saclay, Orsay,France.
CIAMS, Université d'Orleans, Orleans,France.
J Aging Phys Act. 2022 Jul 12;31(1):96-104. doi: 10.1123/japa.2021-0410. Print 2023 Feb 1.
The present study aimed to examine the impact of the level of physical activity on prefrontal cortex activation in older adults during single- and dual-task walking. Thirty physically inactive and 36 active older adults (60-85 years old) performed six 2-min tasks on a treadmill: two static cognitive tasks, two single-task walking tests, and two dual-task walking tests. Hemodynamics at the level of the prefrontal cortex were measured continuously using functional near-infrared spectroscopy to evaluate cortical activation. The perceived difficulty of the task, cognitive performance, and gait parameters were also measured. During the walking tasks, the level of prefrontal cortex activation, the perceived difficulty of the task, cognitive performance, and motor parameters were not significantly different between active and inactive older adults. This unchanged activation with physical activity was likely the consequence of a similar motor and cognitive load and cardiorespiratory fitness in both active and inactive older adults.
本研究旨在探讨在老年人单任务和双任务行走过程中，身体活动水平对前额叶皮层激活的影响。30 名身体不活跃的老年人和 36 名活跃的老年人（60-85 岁）在跑步机上进行了六项 2 分钟的任务：两项静态认知任务、两项单任务行走测试和两项双任务行走测试。使用功能近红外光谱连续测量前额叶皮层水平的血液动力学，以评估皮质激活。还测量了任务的感知难度、认知表现和步态参数。在行走任务中，活跃和不活跃的老年人在前额叶皮层激活水平、任务感知难度、认知表现和运动参数方面没有显著差异。这种与身体活动无关的激活不变性可能是由于活跃和不活跃的老年人具有相似的运动和认知负荷以及心肺适应能力。
