방과 후 스포츠클럽 참여 중학생의 여가경험이 여가정체성 및 여가지속에 미치는 영향

정남주(Nam Ju Chung),하민아(Min Ah Ha),권순재(Soon Jae Kwon),안동수(Dong Soo An) 한국여가레크리에이션학회 2015 한국여가레크리에이션학회지 Vol.39 No.4

The purpose of this study was to verify the effect of leisure experience on leisure identity and leisure continuance of middle school student participating in after school sports club program. To accomplish the purpose of the study, 300 questionnaires were distributed to the middle students participating in after school sports club program(ASSCP) in Seoul using convenience sampling. Due to the reliability of data, 23 samples were discarded and 277 samples were put to actual analysis. By using SPSS Ver. 18.0, frequency analysis, exploratory factor analysis, reliability analysis, correlation and multiple regression were conducted. The results were as follows. First, the subordinating of leisure experience-perceived competence had an influence on Respect, Identification and Emotional attachment. Second, perceived competence, self-affirmation and getaways were effective on leisure continuance. Third, respect and emotional attachment were significantly related to leisure continuance. Main factors of middle school students to participate consistently in ASSCP were respect and emotional attachment-subordinating factors of leisure identity.

배구경기 세터 토스 동작의 운동학적 비교분석

정남주 ( Nam Ju Chung ),김재필 ( Jae Pil Kim ) 한국운동역학회 2015 한국운동역학회지 Vol.25 No.1

Purpose : The purpose of this study was to analyze setter toss motion kinematically according to toss types· Method : Dependent variables were elapsed time, vertical displacement of the body center, the projected speed of the ball, and differences of the jointangle to the target for four setters positioning· Result : There was no significant difference in the time but the ball contact time was shorter when the toss distance of P3 was longer· There wassignificant difference in the vertical displacement of COM (p<·05)· The vertical displacement of COM showed that the vertical movement graduallydecreased when the quick distance was longer· The vertical displacement of COM was difference (p<·05), also there was difference of the ball speed (p<·001)at the Release point(E4)· There was significant difference in the knee joint angle at a certain moment among the Release(E4) and Landing point(E5)(p<·05)· The hip joint was significant difference among the Apex(E2), Ball Touch(E3), Release(E4), and the Landing point(E5) on the surface(E2, E3, E4 p<·05; E5p<·005)· The shoulder angle was significant difference among the Ball Touch(E3), Release(E4) and the Landing point(E5) on the surface(E3, E4 p<·05; E5p<·001)· The elbow was significant difference in the Apex(E2) (p<·05)· The wrist was significant difference in the Release(E4) (p<·05)· Conclusion : If we find the clue to expect the direction of the setter`s ball, we have to fine the clues in the Apex(E2) that hip join and elbow, BallTouch(E3) that hip joint and shoulder joint, Release(E4) that wrist, elbow, hip joint, and knee joint·

죽도 무게변화에 따른 검도 머리치기 동작의 운동학적 분석

정남주 ( Nam Ju Chung ),김재필 ( Jae Pil Kim ),구종모 ( Jong Mo Ku ) 한국운동역학회 2010 한국운동역학회지 Vol.20 No.1

This study was performed to investigate the kinematic factors on the head hitting motion based on weight change of bamboo swords in kumdo. The kinematic factors, needed time per phase, COB displacement and velocity, angle(wrist, elbow, shoulder joint, hip joint, knee joint), were analyzed by the 3-D motion analysis method against 6 male middle school athletes. The results were as follows. 1. The needed time of head hitting motion based on weight change of bamboo swords was shorter when weight was heavier. 2. The COB displacement of left/right was bigger when weight was heavier. the displacement of right foot was higher at backswing phase and impact phase when weight was heavier and at impact time when weight was lighter. 3. The COB velocity was faster at impact time when weight was heavier, the velocity of sword tip was fastest for each event with bamboo sword weight of 440 g. 4. The angle of left elbow was smaller at top of backswing and impact when weight was heavier, the angle of left shoulder was bigger when weight was heavier, the right knee angle was biger at start when weight was heavier, at impact when weight was lighter.

여자해머던지기 턴 동작과 투사국면에 대한 운동학적 기술 요인 분석

정남주 ( Nam Ju Chung ),김재필 ( Jae Pil Kim ),송옥홍 ( Ok Heung Song ) 한국운동역학회 2010 한국운동역학회지 Vol.20 No.4

The purpose of this study was to analyze the kinematic factors and throwing variables for the 3-turn and 4-turn techniques and for release as well as to provide technical advice for improving athletic performance in hammer throwing. Data analysis led to the following conclusions: To increase the rotation speed for the 3-turn and 4-turn techniques, the time elapsed during the 1-foot support period should be decreased the distance between the rotating foot and the rotation axis should be small and the height of the hip joint should be increased at the times of release The throwing angle at the moment of release should be more than 40 degrees, and the throwing position should be taken vertically high at the shoulder joints. To accelerate the motion of the hammer, the speed should not be reduced during the 1-foot support period but should be increased during the 2-foot support period for much greater acceleration. In the 3-turn technique, the angles of the shoulder axis and hummer string should be dragged angle at the maximum point and lead angle at the minimum point, and dragged angle at the maximum and minimum points in the 4-turn at the time of relase The upper body should be quickly bent backward, the knee angle should be extended, and the angles of the shoulder axis and hammer string should be dragged angle close to 90 degrees.

마루운동 제자리 뒤공중돌기 동작의 운동학적 분석

정남주 ( Nam Ju Chung ) 한국운동역학회 2007 한국운동역학회지 Vol.17 No.2

주니어 역도 선수 인상 종목의 Dead-Lift 동작 시 스탠스유형에 따른 운동학적 변인 비교분석

정남주 ( Nam Ju Chung ),김재필 ( Jae Pil Kim ) 한국운동역학회 2008 한국운동역학회지 Vol.18 No.4

한국무용과 발레 무용수의 보행 동작에 대한 운동학적 변인 비교

정남주 ( Nam Ju Chung ),김무영 ( Moo Young Kim ),김한수 ( Han Soo Kim ) 한국스포츠리서치 2007 한국 스포츠 리서치 Vol.18 No.4

The purpose of this study was to analyze the gait patterns of kinematics in Korean traditional and ballet dancers. 12 dancers (ballet dancers: 6, Korean Traditional dancers: 6) were participated in this study. Four cameras were used to get the kinematic data using DLT (Direct Linear Transformation) method. Gait parameters (foot angle, step width, step length and stride), displacement of Center Of Mass in the superior/inferior and left/right direction, and the angles of lower limb were analyzed. The following conclusions were drawn : 1. Gait parameters : Foot angle, step width, step length and stride in ballet dancers were significantly larger than those in Korean Traditional dancers. The ratio of the stance and swing phase in Korean Traditional dancer showed similar result in accordance with the previous study. However, ballet dancers showed short stance phase and large swing phase. 2. Center Of Mass(COM) : COM of superior/inferior displacement in Korean Traditional dancers was smaller than that in ballet. This was explained that COM of superior/inferior displacement in midstance of the right and left foot were small. COM in Korean Traditional dancer was changed from right direction to left direction between the time of the left foot heel-strike and right foot take-off whereas ballet showed that COM was changed from right to left. 3. Angles : Korean Traditional dancers showed greater hip angle than ballet. However, ballet showed greater hip rotational angle in transverse plane than Korean Traditional dancers.

인체 무게 중심 분할에 따른 500m 숏트트랙 스피드 스케이팅 출발 기술 분석

백진호,정남주,한기훈,이용구,윤동섭,이용식,Back, Jin-Ho,Chung, Nam-Ju,Han, Ki-Hoon,Lee, Yong-Goo,Yoon, Dong-Seob,Lee, Yong-Sik 한국운동역학회 2003 한국운동역학회지 Vol.13 No.3

The purpose of this study was to attempt new starting motion and supply present starting motion in the 500M short track speed skating according to the center of gravity position. The center of gravity position ratio was divided starting motion into five(type A : front 80%-back 20%, type B front 70%-back 30%, type C : front 50%-back 50%, type D : front 30%-back 70%, type E : front 20%-back 80%). The three dimension motion analysis with DLT(direct linear transformation) method was executed using two video cameras. The following conclusion was that It was appear that reaction and execution time in starting motion was the most short in type B. It was characteristic that step of skaters was shorten and center of gravity position ratio was not effect to change of the step in each event. It was appear that the displacement of type D and type E were longer than that type A and type B during the starting motion. It was appear that skill types of center of gravity position ratio to the front were lower than that to the back and contract a posture. Observing the above, it was conclusion that skill type B of center of gravity position ratio to the tent was more effect than that to the back. But it is important that these skill type was most used to the competition and estimate the result.

Disciplinary Session 9 / Sport Biomechanics / Gait and Running Analysis : 시각장애자 보행의 역학적 평가

윤희중,류지선,전해자,이연종,정남주 ( Hee Joong Yoon,Ji Seon Ryu,Hae Ja Chun,Yeon Jong Lee,Nam Ju Chung ) 한국체육학회 1998 국제스포츠과학 학술대회 Vol.1998 No.2

펜싱 마르쉬 팡트 기술의 상지에 대한 운동학적 분석

김태영 ( Tae-young Kim ),정남주 ( Nam-ju Chung ),김갑선 ( Kab-sun Kim ) 대한무도학회 2021 대한무도학회지 Vol.23 No.4

본 연구는 여자 펜싱 사브르 공격 기술 중 하나인 마르쉬 팡트 동작에 대하여 득점성공 집단과 득점실패 집단의 운동학적 변인의 차이점을 규명하여 과학적이고 정량적인 자료로 경기력에 도움을 주고자 한다. 펜싱 사브르 여자 대학부 선수 8명을 대상으로 분석하였음 두집단 간의 차이를 규명하기 위해 종속 t-검증(paired t-test)을 실시하였고 통계적 유의수준은 α=.05로 설정하였다. 분석결과 다음과 같은 결론을 얻었다. 마르쉬 팡트 기술의 동작 수행시간에 대한 분석에서 득점성공 집단이 득점실패 집단 보다 더 짧은 수행시간을 보였으며 마르쉬 2구간의 소요시간이 영향을 미치는 것으로 나타났다. 마르쉬 팡트 기술의 동작의 몸통중심 전후변위와 상하변위 모두 득점성공 집단이 득점실패 집단 보다 더 크게 나타났으며 마르쉬 2구간의 이동변위가 영향을 미치는 것을 나타났다. 상지분절의 움직임은 두 집단 모두 유사한 형태를 보였으나 팡트 구간의 움직임은 득점성공 집단이 보다 빠르고 간결하게 수행되었다. 어깨관절각도, 팔꿈치관절각도, 손목관절각도에서 득점성공 집단이 득점실패 집단에 비해 더 큰 신전 움직임을 보여주었다. 결국, 마르쉬 팡트 기술에서 마르쉬 2구간과 팡트 구간의 운동학적 변인이 득점성공 집단과 득점실패 집단의 차이를 규명해주는 중요한 변인임을 보여주었다. The purpose of this study is to investigate the difference in the kinematic variables of the scoring success group and the scoring failure group for Marche Fente motion, one of the female fencing saber attack techniques. 8 female college fencing saber athletes performed the Marche Fente movement. To determine the difference between the two groups, a dependent t-test was performed and the level of statistical significance was set at α = .05. As a result of the analysis, the following conclusions were obtained. In the Marche Fente motion execution time comparison, the success group had a shorter execution time than the unsuccess group. The performance time of Phase 2 of marche was found to be statistically significant between the two groups. The anterior-posterior displacement and vertical displacement of the body center were greater in the success group than in the failure group. The movement of upper extremity was showed a similar pattern in both groups, but movement of Fente was performed quickly and concisely in the success group. In shoulder joint angle, elbow joint angle, and wrist joint angle, the success group showed greater extension movement than the unsuccess group. In the end, it was found that, in the Marche Fente movement, the kinematic variables of the Marche 2 Phase and the Fente Phase were important variables to clarify the difference between the success and unsuccess group.