Abstract
Previous studies had demonstrated that the aerodynamic forces of the knuckling shot in a wind tunnel, and/or the irregular in ball flight path. However, there are still unclear parts how to achieve the knuckling shot on the kicking motion analyses. The aim of this study was to estimate the swing leg coordinated motion during knuckling shot compared with those of instep kicking using motion analysis system. Patients performed knuckling shot and instep kick to target. From result of the comparison, we found difference in pelvis motion between knuckling shot and instep kick. Then, it is suggested that the accomplishment of knuckling shot needs adding redundancies by pelvis compared with instep kick.
