Abstract

According to Farfel’s principle (Farfel, 1977) effective feedback systems applied in training should provide feedback information rapidly and objectively. Powerful information and communication technology simplify the development of sports specific feedback systems of that kind. Special focus may be put on the acquisition and presentation of performance relevant parameters. In the case of table tennis, factors affecting the quality of the ball played are the spin, the position, where the ball hits the table, and the time left for the opponent to react properly (Baca, Baron, Leser & Kain, 2004; Hohmann, Zhang & Koth, 2004). Systems that give immediate feedback on these performance parameters may assist training. The purpose of this paper is to describe two types of feedback systems which have been built and their applications. The first variant is based on the detection of impact positions of the ball on the table, the second on the acquisition of ball impact intervals. Both systems shall direct and condition the technique and, moreover, have a motivational effect in training. Verf.-Referat