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  • Optimizing whole body kinematics to minimize valgus knee loading during sidestepping: implications for ACL injury risk

    Author(s)
    Donnelly, CJ
    Lloyd, DG
    Elliott, BC
    Reinbolt, JA
    Griffith University Author(s)
    Lloyd, David
    Year published
    2012
    Metadata
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    Abstract
    The kinematic mechanisms associated with elevated externally applied valgus knee moments during non-contact sidestepping and subsequent anterior cruciate ligament (ACL) injury risk are not well understood. To address this issue, the residual reduction algorithm (RRA) in OpenSim was used to create nine subject-specific, full-body (37 degrees of freedom) torque-driven simulations of athletic males performing unplanned sidestep (UnSS) sport tasks. The RRA was used again to produce an optimized kinematic solution with reduced peak valgus knee torques during the weight acceptance phase of stance. Pre-to-post kinematic optimization, ...
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    The kinematic mechanisms associated with elevated externally applied valgus knee moments during non-contact sidestepping and subsequent anterior cruciate ligament (ACL) injury risk are not well understood. To address this issue, the residual reduction algorithm (RRA) in OpenSim was used to create nine subject-specific, full-body (37 degrees of freedom) torque-driven simulations of athletic males performing unplanned sidestep (UnSS) sport tasks. The RRA was used again to produce an optimized kinematic solution with reduced peak valgus knee torques during the weight acceptance phase of stance. Pre-to-post kinematic optimization, mean peak valgus knee moments were significantly reduced by 44.2 Nm (p=0.045). Nine of a possible 37 upper and lower body kinematic changes in all three planes of motion were consistently used during the RRA to decrease peak valgus knee moments. The generalized kinematic strategy used by all nine simulations to reduce peak valgus knee moments and subsequent ACL injury risk during UnSS was to redirect the whole-body center of mass medially, towards the desired direction of travel.
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    Journal Title
    Journal of Biomechanics
    Volume
    45
    Issue
    8
    DOI
    https://doi.org/10.1016/j.jbiomech.2012.02.010
    Subject
    Biomedical engineering
    Mechanical engineering
    Sports science and exercise
    Biomechanics
    Publication URI
    http://hdl.handle.net/10072/49406
    Collection
    • Journal articles

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