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RISS 인기검색어
- 검색키워드
- 저자 : 이훈표(Hoon Pyo Lee) (검색결과 6 건)
- 무료
- 기관 내 무료
- 유료
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한희창,윤희중,이훈표,Han, Hee-Chang,Yoon, Hee-Joong,Lee, Hoon-Pyo 한국운동역학회 2003 한국운동역학회지 Vol.13 No.3
The Purpose of this study was to examine the kinematic analysis of the upper-limb motion of wheelchair basketball free throw shooting. Three-dimensional kinematic data were obtained from 8 male wheelchair basketball players performing a successful free throw. Players were divided into three groups, according to their IWBF classification(Group 1: 1 point players, Group 2: 2-2.5point players and Group 3:3.5-4 point players) Wheelchair basketball free throw motions were taken by video camera. The three-dimensional coordinates was processed by DLT. Players from Group 1 and 2 tended to release the ball from a lower height, with greater velocity and release angle. Players from Group 1 showed greater shoulder horizontal adduction and horizontal abduction angle, wrist ulnar flexion and radial flexion angle, and trunk angle. but players from Group 2 appeared lower shoulder abduction. Upper limb angular velocity showed most greatly in hands from Group 1, upperarm from Group 2, and forearm from Group 3.
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휠체어 농구 자유투 동작 시 상체분절의 운동학적 요인 분석
이연종,한희창,이훈표 한국특수체육학회 2003 한국특수체육학회지 Vol.11 No.3
The purpose of this study was to analysis the kinematical variables of one-hand free throw in wheelchair basketball. The subjects of this study were four male wheelchair players registrated in wheelchair basketball athletes. Free throw motions were taken by three video cameras. Three-dimensional coordinates was processed by DLT. The variables were the time duration, displacement, velocity, angle, angular velocity during performing the free throw motion. The result of analysis is summarized as follow. In performing the free throw motion, the duration of backward motion showed longer than its of forward motion, and most subject used forearm for extending the elbow joint than hand upperarm segment. Therefore for improving free throw motion skill in wheelchair basketball players it should be trained the increase of wrist snap motion.
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파워 볼링 투구 동작 시 상지분절의 3차원 움직임 변화
이훈표 한국스포츠리서치 2005 한국 스포츠 리서치 Vol.16 No.2
The purpose of this study was to analyze about the motion change of swing from the top point of the back-swing to the terminal point of the follow-through in the power bowling. For these, two male members from the national team and three male university players were chosen for this study. Based on a rigid body model. reflective marker triads were attached on the 3 segments. Three-dimensional Cartesian coordinates for each marker were determined at the time of recording using DLT technique with Kwon 3d 2.1 software. Coordinate data were low-pass filtered using a fourth-order Butterworth with cutoff frequency of 6Hz. The angles of adduction-abduction. extension-flexsion, and pronation-supination about the swing motion were determined for Matlab 6.5. The following conclusion were drawn; 1. In the motion change of the upper and forearm segment during the swing, the flextion and extension showed a consistantly trajectory. But the hand segment showed the motion change of flexion-extension-flexion order. 2. In the adduction and abduction change, the upper and forearm segments showed a same trajectory during the swing motion. But the hand segment showed a many deviation between the subjects. 3. The subjects showed bigger pronation motion than supination at the release event for increase the rotation force of the ball.
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볼링 릴리즈 시 볼의 속도에 대한 상지분절의 기여도와 착지구간의 역학적 변인과의 관계
이훈표 한국스포츠리서치 2004 한국 스포츠 리서치 Vol.15 No.5
The purpose of this study was to investigate the most effective throwing motion of the bowling by analyzing the biomechanical parameters during the landing phase and the upper limb's contribution to the ball velocity at release. For these, skilled bowlers from the national team and less-skilled bowlers with under one year bowling experiment were photographed and analyzed with the three dimensional cinematography. The result were as follows; 1. Kinematical parameter At the top of the backswing, the less-skilled group kept their upper bodies straightened. While in the release phase both groups showed the contrary results. The less-skilled group accomplished the swing action without changing the angle of their wrist. In contrast, the skilled group displayed extension and flexion at the same phase repetedly. 2. Contribution In the less-skilled group, the contribution that had an effect on the ball velocity appeared in the trunk, the fore arm the upper arm and hand in order. But skilled group appeared in the upper arm the fore arm the trunk, and hand, respectively. 3. Kinetical parameters Maximum ground reaction force in medial-lateral direction of the skilled group was more signilcant in both propelled foot and landed foot compared to that of the less-skilled group. The skilled group displayed the greatest vertical ground reaction force in anterior-posterior direction at the time of using the propelled foot, however as for the minimum regarding the landing foot, both groups showed similar value. The vertical ground reaction force in whole phase was similar to both group.
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