University of A Coruña, Faculty of Nursing and Podiatry, Industrial Campus of Ferrol, Research, Health and Podiatry Group, Department of Health Sciences - Ferrol, Spain.
Escola Superior de Saúde da Cruz Vermelha Portuguesa-Lisboa, Department of Physiotherapy - Lisbon, Portugal.
Rev Assoc Med Bras (1992). 2024 Feb 26;70(2):e20230924. doi: 10.1590/1806-9282.20230924. eCollection 2024.
The objective of this study was to investigate the relationship between upper limb kinetics and perceived fatigability in elderly individuals during an upper limb position sustained isometric task.
A total of 31 elderly participants, 16 men (72.94±4.49 years) and 15 women (72.27±6.05 years), performed a upper limb position sustained isometric task. Upper-limb acceleration was measured using an inertial measurement unit. Perceived fatigability was measured using the Borg CR10 scale.
Higher mean acceleration in the x-axis throughout the activity was associated with higher final perceived fatigability scores. Moderate correlations were observed between perceived fatigability variation and mean acceleration cutoffs in all axes during the second half of the activity. In women, significant correlations were found between all perceived fatigability cutoffs and mean acceleration in the y- and x-axes. However, in men, the relationships between perceived fatigability variation and mean acceleration were more extensive and stronger.
The acceleration pattern of the upper limb is linked to perceived fatigability scores and variation, with differences between sexes. Monitoring upper limb acceleration using a single inertial measurement unit can be a useful and straightforward method for identifying individuals who may be at risk of experiencing high perceived fatigability or task failure.
本研究旨在探讨老年人在上肢等长位置维持任务中，上肢动力学与感知疲劳之间的关系。
共有 31 名老年人参与了本研究，其中 16 名男性（72.94±4.49 岁）和 15 名女性（72.27±6.05 岁），他们完成了一项上肢等长位置维持任务。使用惯性测量单元测量上肢加速度。使用 Borg CR10 量表测量感知疲劳。
在整个活动过程中，x 轴的平均加速度越高，最终感知疲劳得分越高。在活动的后半段，所有轴上的感知疲劳变化与平均加速度截点之间都存在中度相关性。在女性中，所有感知疲劳截点与 y 轴和 x 轴的平均加速度之间都存在显著相关性。然而，在男性中，感知疲劳变化与平均加速度之间的关系更为广泛和强烈。
上肢的加速度模式与感知疲劳得分和变化有关，且男女之间存在差异。使用单个惯性测量单元监测上肢加速度可能是一种有用且简单的方法，可以识别可能经历高感知疲劳或任务失败风险的个体。
