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오정환(Jeong Whan Oh),조필환(Phil Hwan Cho) 한국체육교육학회 2001 한국체육교육학회지 Vol.5 No.2
In this experimental study, we selected 6 males long jump players at high school. For the purpose of analyzing take-off movement in the long jump, we used video-camera and made a kinematical analysis. Within the limitations of this study it is concluded: In order to increase flight distance, several conditions must be fulfilled at the instant of takeoff leg touchdown and takeoff during takeoff phase. 1. the takeoff velocity should be fast at the instant of takeoff leg touchdown and takeoff. The body center of gravity height should be raised at the instant of takeoff leg touchdown and takeoff. 2. the foot contact time should be shortened during takeoff phase and the takeoff distance should be increased at the of takeoff. 3. the total forward angular momentum with respect to a transverse axis through the center of gravity should be increased during the takeoff leg touchdown and takeoff. The active landing style described as clawing the ground with the sole of the takeoff foot should be performed during the takeoff leg touchdown and takeoff.
농구 자유투 동작의 신체 분절각도에 대한 숙련자와 미숙련자간의 운동학적 비교분석
조필환(Phil Hwan Cho),오정환(Jeong Whan Oh) 한국체육교육학회 2001 한국체육교육학회지 Vol.5 No.2
The purpose of this study was to obtain the data for developing and improve the techniques of the free throw in basketball. The subjects of this study were six male basketball player consisted of college students and high school athletes. they were divided into two groups, skilled athletes and unskilled athletes respectively. Free throwing were taken by video camera. The result of analysis is summarized as follows. 1. The angles of trunks of the skilled showed larger than the unskilled at all phase. The difference of trunk angles of phase 1 and phase 2 of the skilled showed larger than that of the unskilled. 2. The wrist joint angle of the skilled showed larger than the unskilled at all phase. The difference of wrist joint angles of phase 1 and phase 2 of the skilled showed larger than that of the unskilled 3. The elbow joint angle of the skilled showed larger than the unskilled at the phase 1. The difference of elbow joint angles of phase 1 and phase 2 of the skilled showed larger than that of the unskilled. 4. The shoulder joint angle of the skilled showed larger than the unskilled at the phase 1 and smaller than in phase 2. The difference of shoulder joint angles of phase 1 and phase 2 of the skilled showed larger than that of the unskilled. 5. The knee joint angles of the skilled showed larger than the unskilled at all phase. The difference of trunk angles of phase 1 and phase 2 of the skilled showed smaller than that of the unskilled.
안의환,정인환,오정환,이성태,김선남 건국대학교 의과학연구소 1998 건국의과학학술지 Vol.8 No.-
Early diagnosis is the key of proper management and reducing of complication in infectious condition of pelvic area. It is difficult to diagnose differentially between pyogenic arthritis of hip joint and osteomyelitis of pelvic bone around hip joint by bone scan that shows only 2 dimensional plane. But it is possible to differnetiate two lesions by SPECT that shows 3 dimensional plane. We report a case of osteomyelitis of ischium around the hip joint in a five year old girl who had severe painful swelling of left buttock, hip and thigh and fever for 2 days. Bone scan showed diffusely increased activity on left hip joint and also pelvic bone surrounding hip joint. But SPECT could visualize increased activity not on left hip joint but only on left ischium. So pyogenic arthritis of hip joint could be ruled out. The patient was cured without any complication by only administration of adequate antibiotics, under the diagnosis of acute osteomyelits of left ischium.