Relationship between Impact Characteristics and Take-off Action in the Rugby Tackle by Players with Different Age and Competitive Leve 1

摘要

Background: Rugby Tackle is an only method for defense to attack. It is necessary to clarify the motion during tackle to know effective tackle, but there have been few studies on motion analysis of rugby tackle and the difference among different competitive levels has not been mentioned. Objective: The purpose of this study is to clarify the characteristics and difference of tackle motion among different competitive levels by analyzing tackle motion of rugby players belonging to high school, college, and professional. Method: Five high school, ten college, and two professional rugby football players volunteered to participate. Infrared reflection markers were placed on principal part on the body, and shot by six infrared cameras (lOOHz). Subjects run enough, landed on the force plate, and tackled on the tackle bag. The acceleration sensor was placed on the tackle bag. Result: Impulse of the tackle bag increased as the competitive level increase, and there was a significant correlation between impulse and subjects' body weight. The duration from land to tackle was longer and duration from tackle to take-off was shorter in professional than in high school and college players. The significant positive correlation was observed between distance between land place and the tackle bag and hip joint angle at maximum angular velocity. Conclusion: The greater impulse of rugby tackle observed in the players having high competitive level associates with the players' body weight and the distance from the land place to the tackle bag.