Skiing Forces and Moments at the Knee and Boot Top: Boot Stiffness Effects and Modeling

TL;DRAbstract

The goals of this study are (1) to quantify the contribution of boot stiffness to the maximum forces and moments predicted at the boot top and knee, (2) to identify generalized regression models predicting the moment components at the boot top and knee for a skiing population, and (3) to quantify the contribution of inertial forces to the forces and moments predicted at the boot top and knee. Six subjects skiing a slalom course alternated test ski runs with lowest boot stiffness and highest boot stiffness settings in a boot with adjustable stiffness. Average (over all subjects and test runs) maximum ankle flexion is significantly greater (P = 0.005) by 11.5 degrees for the soft boot compared to the stiff boot. Average maximum compression force along the tibia is significantly smaller (P = 0.024) by 178N for the soft boot runs compared to the stiff boot runs. No other maximum force or moment component at the boot top and knee is significantly different between soft and stiff boot ski ru

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