Fig. 7.

Averaged trajectories of the racket position and rescaled velocity over the normalized time in the 7 gravity conditions. The racket kinematics have been resampled between 2 consecutive impacts (represented by the 2 vertical lines). A: averaged racket trajectories of the human subjects in the 7 gravity conditions. B: racket trajectory as generated by the model for all gravity conditions. C: rescaled velocity profile for the human subjects (averaged). D: rescaled velocity profile as generated by the model.