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테니스 포핸드 스트로크 시 왼팔의 이용 유무가 스트로크의 정확성에 미치는 영향
우상연,최성범,김호묵 순천향대학교 기초과학연구소 2011 순천향자연과학연구 논문집 Vol.17 No.1
The purpose of this study is to analyze and compare accuracy and kinematic characteristics of forehand strokes upon using the left-hand and non the using left hand in tennis. Six unskilled collegiate players who complied primary tennis course participated in this study. Subjects were requested to hit 10 balls with 4 types each: first, it was two directions(down the line, cross), second, it was two velocities(slow ball, fast ball) and then it was type of using left hand. Variables such as accuracy, time, distance, angle and velocity variables were measured by USPTA method and video cameras. The results of this study are as follows: 1) accuracy of hitting balls was not different according to the type of using left hand. While there was an interaction between ball velocity and hitting direction. 2) impact positions of hitting ball were not different according to the type of using left hand. While impact positions were done near by target direction in cross direction then down the line direction. 3) shoulder rotation angle was not different according to the type of using left hand. While shoulder rotation angle was grater in down the line direction than cross direction. 4) the maximum velocity of racket head was faster in using left hand than non using left hand.
하키 페널티 코너 시 슈팅 방향에 따른 고등학교 선수의 플릭 슈팅 동작 비교
우상연;최성범;김호묵 순천향대학교 기초과학연구소 2010 순천향자연과학연구 논문집 Vol.16 No.1
The purpose of this study was to compare and analyze flick shooting motion in penalty comer according to the stroke direction. Five high school players participated in this study. The 3D kinematic data were collected for each subject performing the penalty comer stroke. The results of the study were as follows: 1) step length and drag length of ball(at the X axis) were larger in right side attacks than in left side attacks, 2) drag length of ball(at the Y axis) were larger in left side attacks than in right side attacks, 3) stick velocity were larger in downward side attacks than in upward side attacks, 4) range of shoulder rotation were lower in right upward side attacks than in the other sides, 5) hip angle were larger in left upward side attacks than in the other sides.
2011 대구세계육상선수권대회 남자 세단뛰기 경기의 운동학적 분석
우상연 ( Sang Yeon Woo ),서정석 ( Jung Suk Seo ),김호묵 ( Ho Mook Kim ),김용운 ( Yong Woon Kim ),최성범 ( Sung Bum Choi ),남기정 ( Ki Jeong Nam ) 한국운동역학회 2011 한국운동역학회지 Vol.21 No.5
The purpose of this study was to analyze the kinematics of the men`s triple jump at the 2011 Daegu World Championships by comparing the results to those at the 2009 Berlin World Championships. The kinematic data were gathered from two steps before take off to the landing using a seven panorama system, and these data were divided into 3 phases for 8 participants. The average jump for the finalists was longer in the Daegu championships (17.46 m) than in the Berlin championships (17.28 m). The longest jump record was increased by 23 cm. The step was the longest at 36% of the total distance, followed by the hop at 30% and the jump at 34%. The first and third phases were substantially longer than the second phase (the step). The horizontal speed at take-off increased in the order hop, step, and jump. Overall, in comparison with the results from Berlin, the horizontal velocity increased, the vertical velocity decreased, and the landing angle decreased.
2011 대구세계육상선수권대회 여자 세단뛰기 경기의 운동학적 분석
우상연 ( Sang Yeon Woo ),서정석 ( Jung Suk Seo ),김호묵 ( Ho Mook Kim ),남기정 ( Yong Woon Kim ),최성범 ( Sung Bum Choi ),김용운 ( Ki Jeong Nam ) 한국운동역학회 2011 한국운동역학회지 Vol.21 No.5
The purpose of this study was to analyze the kinematics of the women`s triple jump event at the 2011 Daegu World aChmpionships by comparing them to those of the 2009 Berlin World Championships. The kinematic data were gathered from two steps before take off to the landing using a 7-camera panorama system. The data were then divided into 3 phases for each of the 8 participants. Similar average results were found the final contestants in the Daegu and Berlin championships, 14.58 m and 14.51 m, respectively. The first step had a relatively short length percentage (29%) compared to the hop and jump (36% and 35%, respectively). At the take off, the horizontal velocity was the lowest for the step, followed by the hop and jump. These results were different from the results for the men, who had an order of hop, step, and jump. Overall, in a comparison of the Daegu and Berlin participants, the vertical speed at take off for the three events was reduced compared to the horizontal speed.