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首页> 外文期刊>Advances in Rheumatology >Quadriceps muscle weakness influences the gait pattern in women with knee osteoarthritis
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Quadriceps muscle weakness influences the gait pattern in women with knee osteoarthritis

机译：股四头肌无力影响膝骨关节炎妇女的步态

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Osteoarthritis is the most prevalent rheumatic disease in the population and is characterized by limitation of main functional activities of daily living, as the gait. Muscle strength is a variable that may be related to performance in daily tasks.Therefore, we to analyze the gait pattern in individuals with knee osteoarthritis (KOA) and to determine associations of gait variables with the level of muscle strength of knee extensors. Sixty-seven female volunteers divided into 2 groups, a KOA group (KOAG, n = 36, 66.69 ± 7.69 years) and control (n = 31, 63.68 ± 6.97 years), participated in the study. The volunteers walked on a 10-m platform at their usual gait speed, using 2 pressure sensors positioned at the base of the hallux and calcaneus. The mean step time, support and double support times, swing time and gait speed were calculated. The evaluation of the quadriceps isometric torque was performed in an extensor chair, with hip and knee flexion at 90°. The procedure consisted of three maximal contractions of knee extension. Peak torque was determined by the highest torque value obtained after the onset of muscle contraction. For statistical analysis, one-way ANOVA and Pearson’s correlation were used, with p   0.05. The KOAG had a 54.76% longer support time, a 13% longer step time (p   0.001), a 30% decrease in swing time (p   0.001) and a 10.7% decrease in gait speed (p = 0.001) compared with controls. The quadriceps isometric torque was 34% (p = 0.001) lower in the KOAG. There was a correlation between kinematic variables and quadriceps torque. Weakness of the quadriceps muscle in women with KOA influences gait pattern, resulting in reduced speed associated with a shorter swing time and longer support time.
机译：骨关节炎是该人群中最普遍的风湿性疾病，其特征是步态是日常生活中主要功能活动的限制。肌肉力量是可能与日常工作表现相关的变量，因此，我们分析了膝骨关节炎（KOA）患者的步态模式，并确定了步态变量与膝盖伸肌肌力水平的关联。 67名女性志愿者分为2组，即KOA组（KOAG，n = 36，66.69±7.69岁）和对照组（n = 31，63.68±6.97岁）。志愿者使用两个位于拇指和跟骨底部的压力传感器，以通常的步态速度在10米平台上行走。计算平均步长，支撑和双支撑时间，挥杆时间和步态速度。股四头肌等距扭矩的评估是在伸椅上进行的，髋和膝屈曲90°。该过程包括三个最大的膝盖伸展收缩。峰值扭矩由肌肉收缩后获得的最高扭矩值确定。为了进行统计分析，使用了单向方差分析和Pearson相关性，p <0.05。与对照组相比，KOAG的支撑时间延长了54.76％，步伐时间延长了13％（p <0.001），摆动时间减少了30％（p <0.001），步态速度降低了10.7％（p = 0.001）。 。在KOAG中，股四头肌的等距扭矩降低了34％（p = 0.001）。运动学变量与股四头肌扭矩之间存在相关性。患有KOA的女性的股四头肌无力会影响步态，导致速度降低，挥杆时间缩短，支撑时间更长。

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