Figure 3. Example of data analysis (subject K).

From the torque signal corrected for artifacts (A), the time, Δt, was measured as the interval between the onset of release and the beginning of torque redevelopment, the latter of which was defined as the intersection between the torque baseline and the cubic least-squares regression line of the initial portion of torque redevelopment. The quick-release distance (ΔL) is expressed as a rotation angle of the footplate (B).