Biomechanical Analysis on 110m Hurdling Motion Choi, Jeom-Dong Department of Physical Education Graduate School Chonbuk National University Jeonju, Korea (Directed by Professor Shin, Bo-Sam Ph.D) Abstract This study aims to analyze the hurdling motion of the first hurdle, which reveals through the v...
Biomechanical Analysis on 110m Hurdling Motion Choi, Jeom-Dong Department of Physical Education Graduate School Chonbuk National University Jeonju, Korea (Directed by Professor Shin, Bo-Sam Ph.D) Abstract This study aims to analyze the hurdling motion of the first hurdle, which reveals through the velocity changing from horizontal into vertical, useful information on hurdling, and provide the primary data for performing the successful hurdling motion in the 110m hurdle. In this study the hurdling motion was divided into five phases such as Take off, Approach, Dip, Landing and One step after hurdling, and each phase was classified into four sections. In these phases and sections, kinematic variances(time, distance of hurdling, height of the body center, velocity and angle) and kinetic variances(surface reaction and joint moment) were analysed. The experiment subject performed hurdling motions six times. The hurdling motions were analyzed through the DLT(Direct Linear Transformation) method of three dimensional cinematography. Surface reaction and joint moment were analyzed by force-platform. The conclusions were as follows: 1. In One step after hurdling, speed increased 0.05 second when the subject ran with the rear leg stepping 45° aside rather than parallel to the running direction, 2. For the most effective hurdling motion during the hurdling, the left thigh was adducted from the Approach motion. During the Dip motion it was adducted more greatly and in the Landing motion it was returned to the original state. On the other hand, the right thigh was abducted during the Dip motion and kept in that state until the Landing motion. In One step after hurdling motion it was returned to the original state. 3. To keep the balance above the hurdle, the right hand was stretched forward in the Dip motion and took and kept the wider motion than the running motion. In the Landing motion, it was returned to running posture. During the Dip motion, to keep the left hand most front posture, the hurdling motion was done with the left hand attached to the left waist closely and the upper body taking a forward-bended posture. 4. In the Take off motion, the direction of power affecting on the foot before middle Support gave to the right side and after middle Support moved to the left side and then foot stamping happened. 5. During the Take off motion, the center of his foot moved to the forward before Support and transferred to the backward after Support and foot stamping happened. Braking power appeared before Support was a little higher than the driving force appeared after Support, 6. During the Take off motion, the figure of moment in the ankle joint was highest in the ankle dorsiflexion moment, and then the abduction moment, lastly the inversion moment. 7. In the beginning part of Support, extension action appeared around the knee joint. Body weight gave force to the flexion moment by the body's acceleration. Muscles showed an abduction moment around the knee joint against the lower leg segmental motion, The result of this study will provide the primary data for hurdling motion forms changing from horizontal speed to vertical speed, and performing the successive hurdling motion. In addition, it will be helpful for completely understanding hurdling and acquiring effective hurdling skills.
Biomechanical Analysis on 110m Hurdling Motion Choi, Jeom-Dong Department of Physical Education Graduate School Chonbuk National University Jeonju, Korea (Directed by Professor Shin, Bo-Sam Ph.D) Abstract This study aims to analyze the hurdling motion of the first hurdle, which reveals through the velocity changing from horizontal into vertical, useful information on hurdling, and provide the primary data for performing the successful hurdling motion in the 110m hurdle. In this study the hurdling motion was divided into five phases such as Take off, Approach, Dip, Landing and One step after hurdling, and each phase was classified into four sections. In these phases and sections, kinematic variances(time, distance of hurdling, height of the body center, velocity and angle) and kinetic variances(surface reaction and joint moment) were analysed. The experiment subject performed hurdling motions six times. The hurdling motions were analyzed through the DLT(Direct Linear Transformation) method of three dimensional cinematography. Surface reaction and joint moment were analyzed by force-platform. The conclusions were as follows: 1. In One step after hurdling, speed increased 0.05 second when the subject ran with the rear leg stepping 45° aside rather than parallel to the running direction, 2. For the most effective hurdling motion during the hurdling, the left thigh was adducted from the Approach motion. During the Dip motion it was adducted more greatly and in the Landing motion it was returned to the original state. On the other hand, the right thigh was abducted during the Dip motion and kept in that state until the Landing motion. In One step after hurdling motion it was returned to the original state. 3. To keep the balance above the hurdle, the right hand was stretched forward in the Dip motion and took and kept the wider motion than the running motion. In the Landing motion, it was returned to running posture. During the Dip motion, to keep the left hand most front posture, the hurdling motion was done with the left hand attached to the left waist closely and the upper body taking a forward-bended posture. 4. In the Take off motion, the direction of power affecting on the foot before middle Support gave to the right side and after middle Support moved to the left side and then foot stamping happened. 5. During the Take off motion, the center of his foot moved to the forward before Support and transferred to the backward after Support and foot stamping happened. Braking power appeared before Support was a little higher than the driving force appeared after Support, 6. During the Take off motion, the figure of moment in the ankle joint was highest in the ankle dorsiflexion moment, and then the abduction moment, lastly the inversion moment. 7. In the beginning part of Support, extension action appeared around the knee joint. Body weight gave force to the flexion moment by the body's acceleration. Muscles showed an abduction moment around the knee joint against the lower leg segmental motion, The result of this study will provide the primary data for hurdling motion forms changing from horizontal speed to vertical speed, and performing the successive hurdling motion. In addition, it will be helpful for completely understanding hurdling and acquiring effective hurdling skills.
주제어
#허들[hurdle]
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