Knee muscle forces during walking and running in patellofemoral pain patients and pain-free controls.

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Show simple item record Besier, Thor en Fredericson, M en Gold, GE en Beaupré, GS en Delp, SL en
dc.coverage.spatial United States en 2012-02-29T23:11:46Z en 2009-05-11 en
dc.identifier.citation Journal of Biomechanics 42(7):898-905 11 May 2009 en
dc.identifier.uri en
dc.description.abstract 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. The muscle force data are available as supplementary material. en
dc.language eng en
dc.publisher Elsevier en
dc.relation.ispartofseries Journal of Biomechanics en
dc.rights Items in ResearchSpace are protected by copyright, with all rights reserved, unless otherwise indicated. Previously published items are made available in accordance with the copyright policy of the publisher. Details obtained from en
dc.rights.uri en
dc.subject Adult en
dc.subject Biomechanics en
dc.subject Case-Control Studies en
dc.subject Female en
dc.subject Humans en
dc.subject Knee Joint en
dc.subject Male en
dc.subject Muscles en
dc.subject Pain Measurement en
dc.subject Patellofemoral Pain Syndrome en
dc.subject Running en
dc.subject Walking en
dc.title Knee muscle forces during walking and running in patellofemoral pain patients and pain-free controls. en
dc.type Journal Article en
dc.identifier.doi 10.1016/j.jbiomech.2009.01.032 en
pubs.issue 7 en
pubs.begin-page 898 en
pubs.volume 42 en
dc.rights.holder Copyright: Elsevier en
dc.identifier.pmid 19268945 en
pubs.end-page 905 en
dc.rights.accessrights en
pubs.subtype Article en
pubs.elements-id 208705 en Bioengineering Institute en ABI Associates en
dc.identifier.eissn 1873-2380 en
dc.identifier.pii S0021-9290(09)00039-6 en
pubs.record-created-at-source-date 2012-02-10 en
pubs.dimensions-id 19268945 en

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