Knee muscle forces during walking and running in patellofemoral pain patients and pain-free controls.
Knee muscle forces during walking and running in patellofemoral pain patients and pain-free controls.
复制标题
DOI：
10.1016/j.jbiomech.2009.01.032
复制
发表时间：
2009-05-11
影响因子：
2.4
通讯作者：
Delp, Scott L.
中科院分区：
文献类型：
--
作者：
Besier, Thor F.;Fredericson, Michael;Gold, Garry E.;Beaupre, Gary S.;Delp, Scott L.
髌股关节疼痛的一种机制是关节应力增加，这取决于股四头肌产生的力。描述肌肉力量，组织应力和疼痛之间的因果关系是困难的，因为无法直接测量这些变量在体内。本研究的目的是评估一组患有髌股关节疼痛的男性和女性患者（n=27，16名女性; 11名男性）在步行和跑步过程中的股四头肌力量，并将其与无疼痛对照组（n=16，8名女性; 8名男性）进行比较。受试者在步态实验室中以自选的速度行走和跑步。将下肢运动学和肌电图（EMG）数据输入到EMG驱动的膝关节肌肉骨骼模型中，该模型针对每个人进行缩放和校准，以估计关节周围10块肌肉中的力。与对照组相比，髌股关节疼痛组在行走过程中股四头肌和腘绳肌的共同收缩更大（p=0.025），标准化肌肉力量更大，尽管两组之间的净膝关节力矩相似。两组跑步时的肌肉力量相似，但髌股关节疼痛组的净膝关节伸展力矩低于对照组。在步行和跑步过程中，女性的标准化腿筋和腓肠肌肌力比男性高30-50%（p<0.05）。这些结果表明，一些髌股关节疼痛的患者可能会经历更大的关节接触力和关节应力比无疼痛的受试者。
One proposed mechanism of patellofemoral pain, increased stress in the joint, is dependent on forces generated by the quadriceps muscles. Describing causal relationships between muscle forces, tissue stresses, and pain is difficult due to the inability to directly measure these variables in vivo. The purpose of this study was to estimate quadriceps forces during walking and running in a group of male and female patients with patellofemoral pain (n=27, 16 female; 11 male) and compare these to pain-free controls (n=16, 8 female; 8 male). Subjects walked and ran at self-selected speeds in a gait laboratory. Lower limb kinematics and electromyography (EMG) data were input to an EMG-driven musculoskeletal model of the knee, which was scaled and calibrated to each individual to estimate forces in 10 muscles surrounding the joint. Compared to controls, the patellofemoral pain group had greater co-contraction of quadriceps and hamstrings (p=0.025) and greater normalized muscle forces during walking, even though the net knee moment was similar between groups. Muscle forces during running were similar between groups, but the net knee extension moment was less in the patellofemoral pain group compared to controls. Females displayed 30-50% greater normalized hamstring and gastrocnemius muscle forces during both walking and running compared to males (p<0.05). These results suggest that some patellofemoral pain patients might experience greater joint contact forces and joint stresses than pain-free subjects.
登录
查看更多内容
影响因子：
2.8
作者：
Cowan, SM;Bennell, KL;McConnell, J
通讯作者：
McConnell, J
DOI：
10.1115/1.2796019
发表时间：
1996-08-01
影响因子：
1.7
作者：
Lloyd, DG;Buchanan, TS
通讯作者：
Buchanan, TS
影响因子：
1.4
作者：
Buchanan, TS;Lloyd, DG;Besier, TF
通讯作者：
Besier, TF
DOI：
10.1097/00005768-200301000-00019
发表时间：
2003-01-01
期刊：
MEDICINE AND SCIENCE IN SPORTS AND EXERCISE
影响因子：
--
作者：
Besier, TF;Lloyd, DG;Ackland, TR
通讯作者：
Ackland, TR
DOI：
10.1249/01.mss.0000176686.18683.64
发表时间：
2005-11-01
期刊：
MEDICINE AND SCIENCE IN SPORTS AND EXERCISE
影响因子：
--
作者：
Besier, TF;Gold, GE;Delp, SL
通讯作者：
Delp, SL