BIOMECHANICAL ANALYSIS ON DYNAMIC PULLING SKILL FOR ELITE INDOOR TUG OF WAR ATHLETES

In order to describe the pulling skill for the elite athletes of indoor Tug of War, the purpose of this study was to determine biomechanical profiles in dynamic pulling exercises. Kanazawa Rescue team of the gold medal record for the 2004 World Indoor TOW Championships participated in this study (N =20). Our data revealed that the elite tug of war athletes could produce 1041.6 N in dynamic pull, I.e., 149.0% of the weight with the load cell method. According to three-dimensional video analysis procedures with the direct linear transformation analysis (DLT) method, it was cleared that the ankle joint of lower leg was rotating at toe off with the pigeon toe position to outsidewards during pushing the floor. Therefore, it is concluded that the lower limb link system involving CaM would be of the most sophisticated skill for the elite indoor TOW athletes

BIOMECHANICAL PROPERTIES OF JUDO THROWING TECHNIQUE, UCHIMATA, ESPECIALLY FOR NEWLY DEVELOPED FLAMINGO TECHNIQUE

The Kododan Judo, organized in 1882 in Japan by the late President Jigoro Kano, is a refined version ofthe ancient martial art of jujitsu. Typically when one envisions martial arts, the mental image includes kicks, punches, and other striking techniques. The sport of Judo involves none of these, but does permit the use of throwing techniques, mat work similar to wrestling, strangle holds and joint locks at the elbow. Despite its original role as a martial art, Judo as practiced today is essentially the highest form of wrestling practiced anywhere in the world (Harter & Bates, 1985)

ANALYSIS OF TIMING SKILL OF DROP EXERCISE IN ELITE INDOOR TUG OF WAR ATHLETES

In order to describe the timing skill of the elite athletes of indoor Tug of War, the purpose of this study was to determine the relationships between peak force time (PT) differences and the peak force (PF) exerted by two pullers. The team holding the gold medal record for the World Indoor TOW Championships 2004 participated in this study (N=22). Also eight novice male students participated. Our data revealed that the sum of individual PF in two pullers was 305.9±41.4kgw and PF exerted by the two pullers was 286.3±38.8kgw, which was 93.6% of the sum PF in skilled pullers. There was approximately 6% loss of PF in skilled pair. A correlation coefficient of .926 and a regression equation in the form of Y=64.193X+2.454 (

TIME ANALYSIS OF SONKYO MOTION IN PROFESSIONAL SUMO-WRESTLERS

The purpose of this study was to investigate the spend time for sonkyo motion in professional sumo-wrestlers. The sumo tournament which held in September 2007 was videotaped. And using this film, the motion time was measured. Moreover 5 motion phases were defined in matches respectively. Results indicated that Yokoduna (the highest ranker) showed the longest motion time in these wrestlers. It is generous that slow speed motion indicates having room to breathe. This may suggest that Yokoduna has the dignity as the highest in rank. Therefore Yokoduna showed this result. However there is no evidence to clarify that thing. It is necessarily to correct more data of motion time in order to clarify the relationship between motion time and rank in further study

A CASE STUDY OF CAI APPLIED TO UKEMI PRACTICE IN JUDO

INTRODUCTION: The purpose of this study was to present materials which can be applied to illustrate the utilization of computer assisted instruction (CAI) in ‘ukemi’ practice in Judo, and includes various ways of teaching kinesiology and biomechanics. METHODS: Subjects consisted of ten students at Hokuriku University in Japan. Each subject participated by performing in a fundamental ukemi practice program for three weeks (twice a week). In this study, instead of a paper textbook, newly developed software for use with a personal computer was applied to teaching ukemi skills. All movements of ukemi performance were recorded by video camera and then analyzed. RESULTS: Students could understand the forms and classifications of ukemi through the program. The use of the personal computer makes the image of ukemi skills very clear and easy to understand. On video, students can see not only their mistakes, but also monitor their positive progress. The students gained confidence gradually, but the video method was unable to show them the timing and the amount of the strength needed to execute various ukemi. CONCLUSIONS: In this study, it is concluded that the utilization of the personal computer and video could improve performance and perfect students’ skills in understanding various types of ukemi, and that CAI had the capability of increasing students’ desire to improve their skills