The effects of walking speed on tibiofemoral loading estimated via musculoskeletal modeling.
The effects of walking speed on tibiofemoral loading estimated via musculoskeletal modeling.
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DOI：
10.1123/jab.2012-0206
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发表时间：
2014-04
影响因子：
1.4
通讯作者：
Browning RC
中科院分区：
文献类型：
--
作者：
Lerner ZF;Haight DJ;DeMers MS;Board WJ;Browning RC
净肌肉力矩（Nm）已被用作关节负荷的代理措施，但肌肉骨骼模型可以估计关节内的接触力。本研究的目的是使用一个肌肉骨骼模型来估计胫股力，并检查步行速度下Numbers和胫股力之间的关系。我们收集了运动学，动力学和肌电图数据，10名成年参与者走在双带测力跑步机上，速度为0.75，1.25和1.50 m/s。我们为每个参与者缩放了肌肉骨骼模型，并使用OpenSim分别通过逆动力学和加权静态优化来计算Nemos和肌肉力。我们从跨膝关节的节段间力和肌肉力的矢量和确定胫股力。估计胫股力随步行速度增加。当步行速度从0.75 m/s增加到1.50 m/s时，站立早期胫股压缩力峰值增加了52%，而膝关节伸展力峰值增加了168%。在后期的立场，峰值压缩胫股部队增加了18%，随着速度的增加。尽管膝关节处的压缩载荷并未与NMM成正比增加，但更快的行走导致在重量接受期间更大的压缩力，以及除了更大的外展NMM之外，压缩和前/后胫股载荷率增加。
Net muscle moments (NMMs) have been used as proxy measures of joint loading, but musculoskeletal models can estimate contact forces within joints. The purpose of this study was to use a musculoskeletal model to estimate tibiofemoral forces and to examine the relationship between NMMs and tibiofemoral forces across walking speeds. We collected kinematic, kinetic, and electromyographic data as ten adult participants walked on a dual-belt force-measuring treadmill at 0.75, 1.25, and 1.50 m/s. We scaled a musculoskeletal model to each participant and used OpenSim to calculate the NMMs and muscle forces through inverse dynamics and weighted static optimization, respectively. We determined tibiofemoral forces from the vector sum of intersegmental and muscle forces crossing the knee. Estimated tibiofemoral forces increased with walking speed. Peak early-stance compressive tibiofemoral forces increased 52% as walking speed increased from 0.75 to 1.50 m/s, whereas peak knee extension NMMs increased by 168%. During late stance, peak compressive tibiofemoral forces increased by 18% as speed increased. Although compressive loads at the knee did not increase in direct proportion to NMMs, faster walking resulted in greater compressive forces during weight acceptance and increased compressive and anterior/posterior tibiofemoral loading rates in addition to a greater abduction NMM.
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影响因子：
2.4
作者：
Liu, May Q.;Anderson, Frank C.;Schwartz, Michael H.;Delp, Scott L.
通讯作者：
Delp, Scott L.
DOI：
10.1249/mss.0b013e318076b54b
发表时间：
2007-09-01
期刊：
MEDICINE AND SCIENCE IN SPORTS AND EXERCISE
影响因子：
--
作者：
Browning, Raymond C.;Kram, Rodger
通讯作者：
Kram, Rodger
影响因子：
2.4
作者：
Neptune, Richard R.;Sasaki, Kotaro;Kautz, Steven A.
通讯作者：
Kautz, Steven A.
DOI：
10.1016/j.apmr.2004.05.015
发表时间：
2005-04-01
影响因子：
4.3
作者：
Messier, SP;DeVita, P;Marsh, AP
通讯作者：
Marsh, AP
影响因子：
4.2
作者：
D'Lima, Darryl D.;Steklov, Nikolai;Colwell, Clifford W., Jr.
通讯作者：
Colwell, Clifford W., Jr.