Table 4. Descriptive data on correlation between the symmetry index JH and running velocity and contact time. Symmetry Index r p Running Velocity .378 .083 Contact Time CT .315 .109 CTdes .171 .394 CTasc .259 .191 Running Velocity, maximal value of the running approach velocity. CTdes, Contact time from touchdown to minimal vertical displacement of the center of gravity (CGzmin). CTasc, Contact time from CGzmin to takeoff. Symmetry index, symmetry index of the kinematics between the two legs. These values are correlations between the symmetry indexJH and symmetry index of the kinematics. There were no significant correlations (N.S.) between the symmetry indexJH and symmetry index of the running velocity or contact time.