• 한국운동역학회지
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• 제26권3호
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• pp.273-284
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• 2016

Objective: The purpose of this study was to investigate effects of upper limb, trunk, and pelvis kinematic variables on the velocity of Apkubi Momtong Baro Jireugi in Taekwondo. Method: Twenty Taekwondo Poomsae athletes (age: $20.8{\pm}2.2years$, height: $171.5{\pm}7.0cm$, body weight: $66.2{\pm}8.0kg$) participated in this study. The variables were upper limb velocity and acceleration; trunk angle, angular velocity, and angular acceleration; pelvis angle, angular velocity, and angular acceleration; and waist angle, angular velocity, and angular acceleration. Pearson's correlation coefficient was calculated for Jireugi velocity and kinematic variables; multiple regression analysis was performed to investigate influence on Jireugi velocity. Results: Angular trunk acceleration and linear upper arm punching acceleration had significant effects on Jireugi velocity (p<.05). Conclusion: We affirmed that angular trunk acceleration and linear upper arm punching acceleration increase the Jireugi velocity.

• 한국운동역학회지
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• 제24권1호
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• pp.1-9
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• 2014

The purpose of this study was to investigate the muscle mechanical properties of the pelvic axial pre-rotational movement for the Jireugi in the Taekwondo Juchumseogi stance. Eleven elite Taekwondo Poomsae athletes participated. Each participant performed 5 right hand Jireugi in Juchumseogi stance as fast and strong as possible while their motion was recorded by a 3D motion analysis system and the ground reaction forces by two force plates. The power and work of the muscular group surrounding the waist were analyzed to verify the effect of the stretch-shortening cycle (SSC) theory. The cause of the greater power seems to be the application of the SSC by the muscles surrounding the waist during the preparation phase of the pre-rotation group. For the none pre-rotation group, they only used the concentric contraction of the muscles surrounding the waist. Because the pre-rotation group used the SSC theory, they had the effect of shortening of the range of movement, creating a fast and more powerful rotation, thus anticipating the increase the magnitude of impact.

• 한국운동역학회지
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• 제26권1호
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• pp.51-69
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• 2016

Objective: The purpose of this study is to suggest new terminology for the ninety-five hand techniques based on the significance of their angular momentum, determined by analyzing each technique's influence or impact on the compartmentalized angular momentum of the trunk, upper arm, and forearm in the Taekwondo Poomsae. Method: An athlete who won the 2014 World Taekwondo Poomsae championship was selected and agreed to participate in the data collection phase of our investigation. The video data was collected using eight infrared cameras (Oqus 300, Qualysis, Sweden) and the Qualisys Track Manager software (Qualisys, Sweden). The angular momentum of each movement was then calculated using the Matlab R2009a software (The Mathworks, Inc., USA). Results: The classification of the ninety-five hand techniques in the Taekwondo Poomsae based on the significance of each segment's momentum is as follows. Makgi (blocking) is classified into fourteen categories, jireugi (punching) is classified into three categories, chigi (hitting) was classified into six categories, palgupchigi (elbow hitting) was classified into four categories, and jjireugi (thrusting) was classified two categories. Conclusion: This study offers a new approach, based on a biomechanical method, to the classification of the hand techniques that reflect kinesthetic motions in the Taekwondo Poomsae.

• 시큐리티연구
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• 제31호
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• pp.187-207
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• 2012

본 연구는 태권도의 기본동작인 주춤서기 자세에서의 주먹 지르기 동작을 3차원 입체영상분석을 통해 유형별로 운동학적 변인인 시간, 속도, 각도, 각속도, 각가속도 등을 분석하여 유형별 특성을 알아보고 올바른 주먹 지르기 동작의 지도방법을 제시하고자 하였다. 이를 위해 대학교 경호무도 태권도 경호무도시범단 3인을 대상으로 실시하였고 다음과 같은 결론은 도출 하였다. 1. 지르기 동작 수행시간 : 각 유형(Type)별 주춤서기 자세에서 주먹 지르기 동작 수행시간은 1구간에서 $0.24{\pm}0.07s$와 $0.42{\pm}0.08s$로 유형(Type)1의 주먹 지르기 동작 수행시간이 빠르게 나타났지만 전체 수행시간에 대한 구간별 비율은 유형(Type)2의 테이크 백(take back)이 더 짧은 것으로 나타났다. 2. 선속도 및 선가속도 변인 : 각 유형(Type)의 국면별 선속도는 모두 다르지만 가장 높은 선속도는 각 유형(Type)의 임팩트 순간 이라 할 수 있으며, 유형(Type)2의 임팩트 순간인 3국면에서 가장 높은 선속도가 나타났다. 3. 관절각 변인 : 유형(Type)별 주먹 지르기 동작이 관절의 각은 임팩트 국면인 유형(Type)1의 주먹 지르기 동작과 유형(Type)2의 주먹 지르기 동작에서 외형적으로 큰 차이가 나지 않지만 유형 (Type)2의 주먹 지르기 동작이 관절각의 변화가 다양해 역동적인 자세를 취하고 있다. 4. 각속도 및 각가속도 변인 : 유형(Type)1의 주먹 지르기 동작이 임팩트 순간인 3국면의 고관절, 견관절, 손목관절 의 각속도는 각각 $0.79{\pm}0.02deg/s$, $0.91{\pm}0.04deg/s$, $5.24{\pm}0.09deg/s$ 로 나타났으며, 유형(Type)2의 주먹 지르기 동작이 임팩트 순간인 4국면의 고관절, 견관절, 손목관절의 각속도는 각각 $1.32{\pm}0.03deg/s$, $0.21{\pm}0.03deg/s$, $4.98{\pm}0.08deg/s$로 나타났다. 유형(Type)2의 임팩트 순간인 3국면의 오른쪽 손목관절의 각가속도의 변화를 보면 $176.24{\pm}1.11deg/s^2$로 유형(Type)1의 임팩트 순간의 각가속도 보다 더 큰 속도의 변화를 보였다.