Fig. 9.
Impact positions on the racket plane. A: median ± SE of projection of the ball center on the racket at impact time is shown on the racket’s surface for 0g and 1g conditions for each participant. Medians are computed pooling together both successful and unsuccessful trials. B: means of Zracket coordinate of the projection on the racket are shown for each ball flight duration. Only the Zracket coordinate is shown because the Yracket axis is perpendicular to the racket surface; thus the Yracket coordinate of ball position was zero at impact with respect to the racket and there was not a significant effect of gravity on the Xracket coordinate.