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.

中文翻译：

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单任务和双任务步行期间身体活动水平对老年人前额皮质血流动力学的影响。

本研究旨在检查体育活动水平对老年人在单任务和双任务步行期间前额叶皮层激活的影响。30 名身体不活跃的老年人（60-85 岁）在跑步机上执行了 6 项 2 分钟的任务：两项静态认知任务、两项单任务步行测试和两项双任务步行测试。使用功能性近红外光谱连续测量前额叶皮质水平的血液动力学，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。在步行任务期间，活跃和不活跃的老年人的前额叶皮层激活水平、任务的感知难度、认知表现和运动参数没有显着差异。