Genç Hazal, Demircioğlu Gamze
Department of Physiotherapy and Rehabilitation, Bahçeşehir University, Istanbul, Turkey.
Department of Physiotherapy and Rehabilitation, Atlas University, Istanbul, Turkey.
Physiother Theory Pract. 2025 Aug;41(8):1555-1563. doi: 10.1080/09593985.2024.2447488. Epub 2024 Dec 25.
Dual-task activities, which involve performing two separate tasks simultaneously, often result in reduced motor function and daily activity performance among individuals with knee osteoarthritis (OA).
This study aimed to investigate the impact of single- and dual-task conditions on muscle strength and performance in individuals with knee OA and examine how cognitive load influences physical task performance in this population.
Sixty patients with knee OA were included. Baseline data included demographic characteristics, pain (Visual Analog Scale), and physical function (Western Ontario and McMaster Universities Osteoarthritis Index (WOMAC)). Muscle strength and performance were assessed using isokinetic and sit-to-stand tests, initially under single-task conditions, and then under dual-task conditions three days later. Dual-tasking involved physical tasks with varying cognitive exercises (changed between sessions) and familiarization sessions to minimize learning effects.
The investigation revealed that individuals with knee OA showed reduced muscle strength and impaired sit-to-stand performance during dual-task activities, with lower peak torque ( = .0025), total work ( = .026), and longer time to peak torque ( = .011). Decreased muscle performance correlated with worse WOMAC scores ( ≤ .01, = -0.506), particularly in dual-task conditions. Regression analysis identified extension total work and the sit-to-stand test as key predictors of dual-task performance, explaining 32.2% of the variance.
Dual-task performance impairs muscle strength and physical function in individuals with knee OA, demonstrated by reduced peak torque, total work, and sit-to-stand performance. Extension total work and sit-to-stand test emerged as key predictors of dual-task performance, emphasizing the need to address cognitive load in rehabilitation strategies.
双重任务活动，即同时执行两项独立任务，通常会导致膝关节骨关节炎（OA）患者的运动功能和日常活动表现下降。
本研究旨在调查单任务和双重任务条件对膝关节OA患者肌肉力量和表现的影响，并探讨认知负荷如何影响该人群的身体任务表现。
纳入60例膝关节OA患者。基线数据包括人口统计学特征、疼痛（视觉模拟量表）和身体功能（西安大略和麦克马斯特大学骨关节炎指数（WOMAC））。使用等速测试和坐立测试评估肌肉力量和表现，最初在单任务条件下进行，然后在三天后的双重任务条件下进行。双重任务包括进行不同认知练习的身体任务（各时段不同）以及熟悉环节，以尽量减少学习效应。
调查显示，膝关节OA患者在双重任务活动期间肌肉力量下降，坐立表现受损，峰值扭矩较低（=0.0025）、总功较低（=0.026）以及达到峰值扭矩的时间较长（=0.011）。肌肉表现下降与更差的WOMAC评分相关（≤0.01，=-0.506），尤其是在双重任务条件下。回归分析确定伸展总功和坐立测试是双重任务表现的关键预测因素，解释了32.2%的方差。
双重任务表现会损害膝关节OA患者的肌肉力量和身体功能，表现为峰值扭矩、总功和坐立表现降低。伸展总功和坐立测试成为双重任务表现的关键预测因素，强调了在康复策略中应对认知负荷的必要性。
