Comparing the Dynamic Model of Torque and Angular Velocity in Four Methods of Performing the Judan Mai-Mawashi-Geri Technique by Elite Male Karatekas

The aim of this study was to compare the dynamic model of torque and angular velocity in four methods of performing the Judan Mai-Mawashi-Geri technique by elite male karatekas. Eighteen elite male kumite practitioners participated in this study with mean and standard deviation age of ۲۴.۱±۳.۵ years, height of ۱۷۶.۲±۴.۶ cm, and weight of ۷۳.۷±۶.۵ kg. They had ۲.۵±۱.۹۸ years of experience in the national karate team and ۲.۸±۱ years of experience in Iran’s Karate Super League. Six markers were attached to the anatomical points of the hitting foot. Three Hero۳ cameras at a speed of ۲۴۰ frames per second were used for collecting data about four methods of performing the Judan Mai-Mawashi-Geri technique. SkillSpector (version: ۱.۳.۲) was used to obtain the joint coordinates (XY) and MATLAB was used to build the model. The one-way analysis of variance and the Bonferroni post-hoc test (p≤۰.۰۵) were used for statistical analysis after ensuring the normality of data distribution. The results showed a significant difference in the maximum torque and maximum angular velocity of the pelvic, knee, and ankle joints in the four methods of performing the Judan Mai-Mawashi-Geri technique. According to the results of the study, while emphasizing the sequential order of torque of the proximal to distal limb joints, we recommend the third method of performing the Judan Mai-Mawashi-Geri technique for an optimal and powerful implementation of this skill since the angular velocity of the knee joint is directly related to the peak velocity of the foot.

Keywords:

Karate , Dynamic Model , Judan Mai-Mawashi-Geri , Torque , Angular Velocity