Kinematic and kinetic analyses of the Wing Chun straight punch

摘要

The main purpose of this study was to identify factors that may affect the performance of Wing Chun straight punch. Seven male professional subjects participated in the experiment. They were asked to perform the straight punch while standing in front of a wall mounted force plate. Impact force data were collected with the force plate and upper extremity kinematics was recorded using a high-speed camera. Significant relationship was found between impulse and effective mass (r = 0.81, p <; 0.0001) while no significant relationship was observed between impulse and impact velocity (r = 0.20, p = 0.36). The effective mass was inversely related to impact velocity (r = -0.72, p <; 0.0005). Significant relationship was observed to elbow peak angular velocity for impact velocity (r = 0.44, p <; 0.05), impact acceleration (r = 0.66, p <; 0.002), impulse (r = -0.43, p <; 0.05) and effective mass (r = -0.58, p <; 0.01). The results indicated that the effective mass was the only variable in improving the effectiveness of the straight punch. Additionally, high values of the loading rate, as a sign of hand overuse injuries, was observed.