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휠체어 농구 투 핸드 3점 슛 동작 시 성공과 실패에 따른 운동학적 비교분석
오정환(Oh, Cheong-Hwan),이채민(Yi, Tchae-Min),신의수(Shin, Eui-Su),배재희(Bae, Jae-Hee),이정태(Lee, Jeong-Tae) 한국체육과학회 2018 한국체육과학회지 Vol.27 No.6
The purpose of this study is to comparatively analyze the kinematic variables such as how long it takes in each phase, the CM(center of mass) displacement, CM velocity and body segment angles for when a three point shoot by wheelchair basketball players succeed or fail. The conclusion based on the experiment results are as follows. First, there was no significant difference in the time it took for each phase of a three point shoot whether it was a success or failure. Second, there were no significant differences in the upper arm segmentation, fore arm segmentation, hand segmentation, the ball was left and right of position, horizontal of position and vertical of position whether the three point shoot was a success or failure. However, the mean of the position in the front and back of the hand segmentation showed a higher position change in the second phase in cases of failure. As for the change in position from left to right, the mean value saw no change in the second phase in cases of success, but success cases saw a higher change in position in the third phase. Third, there was no significant differences in the upper arm segmentation, fore arm segmentation or the velocity of the ball whether it was a success or failure, but the mean value for a success case was faster in the third phase. Fourth, there were no significant differences in the shoulder joints, elbow joints, wrist joints or projection angle whether it was a success or a failure, but the mean value of the projection angle in the success case was lower.
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초등학교 저학년 안전교육을 위한 가방휴대보행의 운동역학적 분석
오정환(Oh, Cheong-Hwan),김준식(Kim, Jun-Sik),이채민(Yi, Tchae-Min),신의수(Shin, Eui-Su) 한국체육과학회 2020 한국체육과학회지 Vol.29 No.2
The purpose of this study is to carry out kinetics analysis of baggage walking for safety education in lower elementary school. 3D motion analysis and ground reaction force analysis were used to analyze the bending angle of the neck, tilt angle of body, medial-lateral stability index, anterior-posterior stability index and maximum impact force. The mean and standard deviation of each variable were calculated using the SPSS 24.0 program. The t-test was used to verify the difference according to the weight of the bag. The significance level was set to α=.05. First, the angle of bending of the head was significantly different when walking according to the weight of the bag, and the angle of the head was 10% larger than that of 5%. Second, the tilt angle of trunk was significantly different from the weight of the bag during walking, and the angle of the body was 10% larger than 5%. Third, medial-lateral stability index and anterior-posterior stability index did not show any significant difference. Fourth, the maximum impact force showed a significant difference and the maximum impact force was 10% larger than 5%. These results suggest that the heavy weight of bag in the lower grades of elementary school could negatively affect musculoskeletal health risks. Therefore, it is considered that the weight of the bag should be lowered and the proper posture of the bag walking should be studied.
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