Segment-Interaction Analysis of a Kung-Fu Straight Punch

摘要

The aims of this study were to determine sequential pattern of the movement and to investigate the relationship between the muscle and interactive torques in straight punch of Wing Tsun Kung-Fu. Seven male right-handed athletes participated in the experiment. They performed the straight punch when standing in front of a wall mounted target and their upper limb kinematics was recorded using a 2D high-speed camera (300 Hz). Net joint torques was calculated by inverse dynamic approach while athletes' upper limb was modeled with a two-link planar system. Time to peak of segment angular velocities was occurred simultaneously that was in contrast with the proximal-to-distal segment sequencing which is mainly reported for the combat techniques. Moreover, in the total time of the movement, the interactive torques counteracted muscle torques for both shoulder and elbow joints.