Department of Rehabilitation Medicine, Lund University Hospital, Lund, Sweden Department of Health Sciences, Lund University, Lund, Sweden.
NeuroRehabilitation. 2013;33(3):457-64. doi: 10.3233/NRE-130978.
To assess muscle strength in the knee extensors, knee flexors and ankle dorsiflexors in persons with late effects of polio, and determine how much muscle strength, gender, age and BMI are related to gait performance.
Ninety community-dwelling ambulant persons (47 men and 43 women; mean age 64 years SD 8) with late effects of polio participated. Isokinetic concentric knee extensor and flexor muscle strength was measured at 60°/s and ankle dorsiflexor muscle strength at 30°/s. Gait performance was assessed by the Timed "Up & Go", the Comfortable and Fast Gait Speed tests, and the 6-Minute Walk test.
There were significant correlations between knee extensor and flexor muscle strength and gait performance (p < 0.01), and between ankle dorsiflexor muscle strength and gait performance (p < 0.05), for both lower limbs. Muscle strength in the knee extensors and flexors explained 7% to 37% and 9% to 47%, respectively, of the variance in gait performance. Strength in the ankle dorsiflexors explained 4% to 24%, whereas gender, age and BMI contributed at most an additional 9%.
Knee muscle strength, and to some extent ankle dorsiflexor muscle strength, are predictors of gait performance in persons with late effects of polio, but the strength of the relationships indicates that other factors are also important.
评估小儿麻痹后遗症患者膝关节伸肌、屈肌和踝关节背屈肌的肌肉力量，并确定肌肉力量、性别、年龄和 BMI 与步态表现有多大关系。
90 名居住在社区、能独立行走的小儿麻痹后遗症患者（47 名男性和 43 名女性；平均年龄 64 岁，标准差 8 岁）参与了研究。采用等速向心测试测量膝关节伸肌和屈肌的 60°/s 肌肉力量，以及踝关节背屈肌的 30°/s 肌肉力量。步态表现通过计时“起立-行走”测试、舒适和快速步态速度测试以及 6 分钟步行测试进行评估。
膝关节伸肌和屈肌的肌肉力量与步态表现之间存在显著相关性（p<0.01），踝关节背屈肌的肌肉力量与步态表现之间也存在显著相关性（p<0.05），对双侧下肢均如此。膝关节伸肌和屈肌的肌肉力量分别解释了步态表现的 7%至 37%和 9%至 47%的变异性。踝关节背屈肌的肌肉力量解释了 4%至 24%的变异性，而性别、年龄和 BMI 最多只能额外贡献 9%。
膝关节肌肉力量，在一定程度上还有踝关节背屈肌的肌肉力量，是小儿麻痹后遗症患者步态表现的预测因素，但这些关系的强度表明其他因素也很重要。
