Farahpour Nader, Jafarnezhadgero AmirAli, Allard Paul, Majlesi Mahdi
Kinesiology Department, Bu-Ali Sina University, Hamedan, Iran.
Department of Physical Education and Sport Sciences, University of Mohaghegh Ardabili, Ardabil, Iran.
J Electromyogr Kinesiol. 2018 Apr;39:35-41. doi: 10.1016/j.jelekin.2018.01.006. Epub 2018 Jan 31.
The objectives of this study were to investigate whether excessive feet pronation alters the joints' kinematics, kinetics and the activity of involved muscles during gait in low back pain patients.
The lower limb joints' motion, moment and power, as well as the activity of involved muscles during walking were measured in a control group, and two experimental groups including a group with excessive feet pronation only, and another group of low back pain patients with excessive feet pronation.
In both experimental groups, ankle inversion, knee flexion and internal rotation, hip internal rotation, plantar flexors' moment, hip flexors' moment, and peak positive ankle power were lower than those in control group (p < .05). Besides, in patients, higher activity of gastrocnemius medialis, gluteus medius, erector spinae, and internal oblique muscles, and lower negative power at the ankle and peak positive power at the knee were observed (p < .05). In conclusion, pronated feet with low back pain was associated with less ankle inversion and knee flexion, higher knee and hip internal rotation, higher muscle activity, less energy absorption at the ankle, and reduced positive power at the knee. This study reveals that strengthening of the muscles especially knee extensors are of great importance in low back pain patients with feet pronation.
本研究的目的是调查在腰痛患者步态过程中，足部过度内旋是否会改变关节的运动学、动力学以及相关肌肉的活动。
在一个对照组以及两个实验组中测量下肢关节的运动、力矩和功率，以及行走过程中相关肌肉的活动，两个实验组分别为仅足部过度内旋组和伴有足部过度内旋的腰痛患者组。
在两个实验组中，踝关节内翻、膝关节屈曲和内旋、髋关节内旋、跖屈肌力矩、髋关节屈肌力矩以及踝关节峰值正向功率均低于对照组（p < 0.05）。此外，在患者中，观察到腓肠肌内侧头、臀中肌、竖脊肌和腹内斜肌的活动较高，踝关节负向功率较低以及膝关节峰值正向功率较低（p < 0.05）。总之，伴有腰痛的足部内旋与较少的踝关节内翻和膝关节屈曲、较高的膝关节和髋关节内旋、较高的肌肉活动、踝关节较少的能量吸收以及膝关节正向功率降低有关。本研究表明，对于伴有足部内旋的腰痛患者，加强肌肉尤其是膝关节伸肌的力量非常重要。
