Forces and Moments at the Knee and Boot Top: Models for an Alpine Skiing Population

in Journal of Applied Biomechanics
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The purpose of this study was to identify regression models to predict moments at the boot top and knee from the force components at the bindings for a sample of skiers. Six subjects skied a slalom course, first with their boots set to the least stiff setting and then with their boots set to the most stiff setting. Six load component dynamometers measured force and moment components at the toe and heel bindings. An electrogoniometer measured ankle flexion. Regression models were developed for the subject sample that predicted quasi-static moment components at the boot top and knee from measurements of ankle flexion and the quasi-static force components at the bindings. Large anterior bending moment was not necessarily accompanied by large ankle flexion, which emphasized that binding designs and standards for injury prevention must account for forces and moments at the sites of potential injury, rather than limiting consideration to boot stiffness or forces at the bindings.

Albert G. Yee is with FANUC Berkeley Laboratory, 29700 Kohoutek Way, Union City, CA 94587. C.D. Mote, Jr., is with the Development Office, 2440 Bancroft Way, University of California, Berkeley, CA 94720.

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