규칙적인 운동참여가 고령자의 정신건강에 미치는 영향

서국은(Kook Eun Seo),신상근(Sang Keun Shin) 한국발육발달학회 2001 한국발육발달학회지 Vol.9 No.2

테니스 양손 백핸드 드라이브 스트로크 시 볼 방향성에 따른 수평회전운동 비교분석

서국은 ( Kook Eun Seo ),정용민 ( Yong Min Chung ),강영택 ( Young Taek Kang ) 한국운동역학회 2015 한국운동역학회지 Vol.25 No.3

Objective : The purpose of this study was to compare the kinematic data of the horizontal rotation movements of shoulder, hip, knee during two-handed backhand drive stroke according to two different ball directions. Methods : The kinematic variables were analyzed such as the joint angles of the lower body, horizontal rotation angles of the shoulder, hip, inter-knee segment, body twist angle and difference in angle of forward swing. Two-handed backhand drive stroke was analyzed through a three-dimensional motion analysis. The collected data were analyzed by a paired t-test, and the statistical significant value was set at α=.05. Results : The findings of this study were as follows; First, there was no difference in the total angles of lower limb joints from the forward swing position to impact posterior. Second, there was no difference in the horizontal rotation angles of E1 shoulder, hip, and E2 shoulder but the horizontal rotation angles of E1 knee, E2 hip, knee, E3, and E4 shoulder, hip, and knee were different in all events. Third, there was no difference in the body twist angle of the maximum horizontal rotation. In addition, there was no difference in the angle of the body twist by the ball direction in the shoulder-hip, the hip-knee and the shoulder-knee. Conclusion : Horizontal rotation angle determines ball directions.

테니스 양손 백핸드 스트로크 시 스웡타입에 따른 라켓헤드속도와 라켓 면각도 비교분석

서국은(Seo, Kook-Eun),강영택(Kang, Young-Taek) 한국체육과학회 2014 한국체육과학회지 Vol.23 No.6

The purpose of this study was to analyze the difference between swing types during a open stance and to enhance performance and skill. Six male university players were the subjects, and the mean difference between the kinematic variables such as the velocity of racket head, X, Y, Z components velocity of racket head, angle of racket face in a two-handed backhand stroke through a three-dimensional motion analysis. The test data was analyzed by a paired t-test, and the alpha level of α = .05 was set for all tests of significance. The findings of the study were as follows; First, there was difference in the velocity of racket head to E2, E3, E4 event of the two swing types during the open stance. Second, there was difference in the drive swing to x components velocity and the top spin swing to z components velocity between the two swings types during the open stance. Third, there was no difference in the angle of racket face of the two swing types during the open stance.

Disciplinary Sport Biomechanics : 창 선단부 상 · 하면의 표면압력에 관한 연구

서국은 ( Koo Keun Seo ) 한국체육학회 1996 국제스포츠과학 학술대회 Vol.1996 No.2

스탠스 유형에 따른 테니스 포핸드 스트로크의 라켓헤드 속도분석

서국웅 ( Kuk Woong Seo ),강영택 ( Young Teak Kang ),이경순 ( Kyung Soon Lee ),서국은 ( Kook Eun Seo ),김정태 ( Jung Tae Kim ) 한국운동역학회 2007 한국운동역학회지 Vol.17 No.1

자이로키네시스 운동이 만성허리통증을 호소하는 여성 사무직 근로자들의 정적밸런스 시 COP에 미치는 영향

박소연(Park, Soh-Youn),서국은(Seo, Kook-Eun),박태진(Park, Tae-Jin) 한국체육과학회 2015 한국체육과학회지 Vol.24 No.5

The purpose of this study was to analyze the effects of Gyrokinesis exercise on sagittal spinal alignment, static balance of office workers who had a Chronic Low Back Pain. The subjects of this study are 18 female among the sedentary workers, whose age range from late 20 to late 30. The exercise program consists of 70min/day, 2 days/week for 8 weeks. All data were analyzed by paired-t test using SPSS version 21.0, calculated %diff values of before and after the exercise for the difference and signification was set as α=.05. In terms of COP after the exercise, showed decrease in s everal a spects ; sway distance, total sway distance, sway range, sway area, sway speed and velocity. In a further study, a great quantity of researches on spinal alignment are necessary in regards of the Gyrotonic exercise as a spine -focussed-exercise. Not only office workers, COP of the static balance but also various dynamic variables should be studied.

남자 볼링선수들의 투구동작 시 구질에 따른 운동역학적 분석

이미경(Lee, Mi-Kyoung),서국은(Seo, Kook-Eun),양정옥(Yang, Jeong-Ok),박태진(Park, Tae-Jin),신상근(Shin, Sang-Keun) 한국체육과학회 2011 한국체육과학회지 Vol.20 No.6

The purpose of this study was to investigate the kinetic factors of the straight, hook, curve of throwing motions in bowling according to the three pitches of male bowlers and to provide the basic data of consistent throwing motion techniques and instructions. Six male bowlers in B city were participated in this experiment and their pictures were taken with 3-D image analysis. All data were presented by analyzing the mean time of each phase, the range of angle and gravity, the pattern of throwing, the mean of velocity during release motion, and the angular momentum. The results were as follows: In the male bowlers’ throwing motions ‘Of three pitching speed - straight, hook, and curve, for the at the release, curve was rapid than the straight or the hook. In the male bowlers’ throwing motions of three - straight, hook, and curve, for the angular momentum by event, the antebrachial angular momentum tended to increase gradually over the angular momentum of the trunk of body and humerus. In conclusion, in the male bowlers’ throwing motions of three pitches - straight, hook, and curve balls, it is crucial to secure the stability leftward and rightward in the movement range of the center of gravity, to preserve the low posture upward and downward right before the release point, and to increase the antebrachial angular momentum.

초등학교 육상남자 체육영재 선발자의 체형, 체력특성 및 상관성 분석

정은이(Jung, Eun-Yi),서국은(Seo, Kook-Eun),신상근(Shin, Sang-Keun) 한국체육과학회 2012 한국체육과학회지 Vol.21 No.4

The purpose of this study was to analyze the simple correlation coefficient and characteristics of physical fitness and somatotype between selected boys and non-selected boys in athletics talents in order to provide scientific basic data for athletic training. The subjects of study were 56 boys composed of selected talents(n=30) and the non-selected talents(n=26) that have participated. The subjects were elementary school boys (grade 1 to 3) from Busan, Ulsan and Gyung-Nam province. The variables of 6 somatotype and physical fitness were measured using KOSTASS(Korea Sport Talent Search System developed by Korea Institute of sports science, 2007) in all the subjects before the start of the training program. The alpha level of p<.05 was set for all test of significance. The results of this study are as follows; 1. In the average somatotype, the selected talents were mesomorph-ectomorph (=2.8-3.7-3.4) and non-selected talents were mesomorph-endomorpht =4.1-4.1-2.9). 2. In the differences among physical fitness variables between the selected talents and non-selected talents, throw ball, sit-up, half-squat jump, 50m run(p<.05), standing long jump(p<.01) were significantly. 3. In the correlation between somatotype and physical fitness, Half-squat Jump was a significant negative correlation(p<.05), 1,000m Run and Walk was significantly correlated(p<.05) in endomorphic component. In the correlation between mesomorphic component which characterizes muscle and bone development and ectomorphic component on the degree of lean person and physical fitness was no correlation. According to the results of the study, the selected talents showed lower endomorphic component but higher ectomorphic components and mesomorphic component than the non-selected talents in the classification of H-C and the selected talents showed higher than the non-selected talents in the physical fitness.

남자 프로골퍼의 드라이버와 아이언 스윙 시 X-factor Stretch에 관한 비교 분석

박태진 ( Tae Jin Park ),서국은 ( Kook Eun Seo ) 한국운동역학회 2010 한국운동역학회지 Vol.20 No.4

The purpose of this study was conducted to make a comparative biomechanical analysis of X-factor and X-factor stretch during driver and iron swing. The subjects were composed of 10 professional golfers with more than 10 years career. The result was as follows: First, the analysis of the back swing with driver and iron swing showed no differences statistically between both the timing in horizontal rotating of shoulder and hip, the time required for X-factor stretch also showed no differences statistically. Second, the back swing with a driver swing showed more maximum horizontal rotation of shoulder and hip joint than the back swing with an iron swing, but the twist of shoulder and hip that was X-factor stretch angle showed no difference. Third, the GRF of the max value for the left and right foot during shoulder and hip horizontal rotation of back swing showed no differences statistically in the movement of driver and iron swing during the back swing, and the GRF of X-factor stretch for the left and right foot showed no differences statistically in driver and iron swing. Therefore the result of this research showed that the operation of torso(X-factor stretch) and weight shifting were similar although the horizontal rotation of body was different during the driver and iron swing.

남자 테니스 선수들의 양손 백핸드 동작 시 스탠스에 따른 어깨와 힙 수평회전에 관한 운동학적 비교 분석

임형준(Lim, Hyung-Joon),서국은(Seo, Kook-Eun),강영택(Kang, Young-Taek),박태진(Park, Tae-Jin) 한국체육과학회 2011 한국체육과학회지 Vol.20 No.5

The purpose of this study is to analyze and compare the kinematic variables of the trunk in order to investigate the differences between stance types during the two-handed backhand motion of male tennis players. This will provide quantitative data to assist precise and efficient instruction by determining reference points of position, enhanced performance and skill.In order to achieve these objectives, six male players were selected at a national athletics meeting, and the mean difference between their kinematic variables during a two-handed backhand stroke was studied using three-dimensional motion analysis. The paired t-test was used to compare the stance types, and a one-way ANOVA was used to compare the phase at the time of swinging. Through this process, the following conclusions were obtained. In the backswing phase, the maximum horizontal rotation of the shoulder and hip joints from an open stance is faster than that from a square stance. However, trunk coiling begins at the same time for both stances. In the backswing phase, the maximum horizontal rotation of the shoulder and hip joints in a square stance occurs more often than in an open stance, but the angle of trunk coiling in the open stance is larger than that in a square stance.