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Joint Stiffness

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  • Joint Stiffness

    Biomch-L Colleagues,

    I have a query that relates very closely to a question recently posed by
    John Finan (University College Dublin) on joint stiffness. Within our
    research we are modelling the Standing Hybrid III Dummy on a moving floor.
    The defined joint stiffness of the lower limbs (particularly the knee)
    consist of little or no stiffness throughout the normal range of motion
    with a dramatic increase when nearing the end of the joint ROM. This is to
    simulate the physical end-limits of joint motion.Therefore any upward
    movement of the floor causes the dummy to crumble. Is there any data or has
    there been any work done on the stiffness properties of these joints in
    anticipation of an upward force? For example, the stiffness in the knee
    before landing from a jump. We are not primarily concerned with any
    increased stiffness due to increased muscle activation during the impact.
    We would like some idea of joint stiffness applied by the semi-conscious
    muscle activation in anticipation of the upward force.

    Your help would be greatly appreciated and a summary will be posted.


    Justin Ludcke
    PhD Student
    School of Mechanical, Manufacturing and Medical Engineering
    Queensland University of Technology
    GPO Box 2434
    Brisbane Q 4001

    Ph: +61 7 3864 2980
    Fax: +61 7 3864 1469
    Email :

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