BIOMECHANICAL ANALYSIS OF THE DEFENSE TECHNIQUE IN TAI CHI PUSH HANDS

Abstract

Developed from traditional Chinese martial arts, Tai Chi (TC) exercise includes different forms and Push Hands which are more advanced movements. No biomechanical analyses of interactive Push Hands have been found. To analyze the kinematic, kinetic and electromyographic characteristics of Tai Chi Push Hands, an experienced master was asked to defend pushing by another person for three trials. The movements were videotaped and digitized using a motion analysis system combining electromyography and force plate data. The results indicated that a certain postural adjustment was adopted by the master. A clear shift of body weight from the front to the rear foot and larger mediolateral displacement of the center of gravity (COG) was observed. Low activities were in the upper body muscle groups, while higher electromyographic values were in the right rectus femoris and substantially higher activity in the left rectus femoris during the defense. It is concluded that the TC defensive technique includes postural adjustment which slightly changes the pushing force direction, and allows the rear leg to resist the incoming force.