Grabljevec K, Burger H, Kersevan K, Valencic V, Marincek C
Institute for Rehabilitation Ljubljana, and University of Ljubljana, Faculty of Electrical Engineering, Slovenia.
Disabil Rehabil. 2005 Jul 22;27(14):791-9. doi: 10.1080/09638280400020623.
To compare the strength and endurance of knee extensors in subjects after paralytic poliomyelitis as well as to extend the comparison to healthy subjects.
Twenty subjects after poliomyelitis with new symptoms (SYM group), 10 without new symptoms (ASYM group) and 15 healthy controls were included. To determine strength, isometric maximal voluntary contraction (MVC) torque of knee extensors in both legs was determined by Biodex dynamometer at 60 degrees knee angle. To determine endurance, the subjects were asked to maintain force in the knee extensors in the same position, in the range between 40-45% of MVC torque, as long as possible. The 'tensiomyography' method was applied to measure the radial displacement of m. rectus femoris during submaximal continuous electrical stimulation until recording a flat response.
No significant difference in MVC torque and endurance was found between SYM and ASYM group, as well between the duration of m. rectus femoris response of both groups to submaximal electrical stimulation. MVC torque and endurance of knee extensors with 'normal' strength was significantly lower in post-polio subjects compared to healthy controls.
Endurance of knee extensor muscles in post-polio subjects is generally and significantly lower than that of knee extensors in healthy subjects, regardless of the implication of normal strength and subjective observations of post-polio subjects.
比较小儿麻痹后遗症患者股四头肌的力量和耐力，并与健康受试者进行对比。
纳入20名有新症状的小儿麻痹后遗症患者（SYM组）、10名无新症状的患者（ASYM组）以及15名健康对照者。为测定力量，使用Biodex测力计在膝关节角度为60度时测定双腿股四头肌的等长最大自主收缩（MVC）扭矩。为测定耐力，要求受试者在膝关节保持相同姿势，在MVC扭矩的40 - 45%范围内尽可能长时间地维持股四头肌的力量。采用“张力肌电图”方法，在次最大持续电刺激期间测量股直肌的径向位移，直至记录到平稳反应。
SYM组和ASYM组之间，以及两组股直肌对次最大电刺激反应的持续时间之间，在MVC扭矩和耐力方面均未发现显著差异。与健康对照者相比，“力量正常”的小儿麻痹后遗症患者股四头肌的MVC扭矩和耐力显著更低。
小儿麻痹后遗症患者股四头肌的耐力总体上显著低于健康受试者，无论小儿麻痹后遗症患者的力量正常与否及主观感受如何。
