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Kinematic variables for a single representative subject (male sprinter) across his individual range of speeds. (A) Ground contact time, Tc. (B) Step rate, SR, and step length, SL. (C) Total thigh excursion during ground contact phase, θc, and total thigh excursion from peak extension through peak flexion, θtotal. (D) Average thigh angular velocity during entire gait cycle, ωavg, and lower limb vertical velocity at instant of touchdown (Ankle Vztd).
