Comparison of kinetics characteristics of footwork during stroke in table tennis: cross-step and chasse step

The cross-step and chasse step are the basic steps of table tennis. This study presents a protocol to investigate the ground reaction force characteristics between cross-step and chasse step during stroke in table tennis. Sixteen healthy male national level 1 table tennis players (Age: 20.75 ± 2.06 years) volunteered to participate in the experiment after understanding the purpose and details of the experiment. All participants were asked to hit the ball into the target zone by cross-step and chasse step, respectively. The ground reaction force in the anterior-posterior, medial-lateral, and vertical directions of the participant was measured by a force platform. The key finding of this study was that: the posterior ground reaction force of cross-step footwork (0.89 ± 0.21) was significantly large (P = 0.014) than the chasse step footwork (0.82 ± 0.18). However, the lateral ground reaction force of cross-step footwork (-0.38 ± 0.21) was significantly lower (P < 0.001) than chasse step footwork (-0.46 ± 0.29) as well as the vertical ground reaction force of cross-step footwork (1.73 ± 0.19) was significantly lower (P < 0.001) than chasse step footwork (1.9 ± 0.33). Based on the mechanism of the kinetic chain, the better lower limb dynamic performance of sliding stroke may be conducive to energy transmission and thus bring gain to the swing speed. Beginners should start from the chasse step to hit the ball technically, and then practice the skill of cross-step.