국제체조대회 남자 평행봉종목 연기내용 분석

최영철(Choi, Young-Chyul),이진(Lee, Jin),최칠섭(Choi, Chil-Sub) 한국체육과학회 2012 한국체육과학회지 Vol.21 No.6

In this study, performances of 8 players, who participated in the game I of parallel bars in the 2010 Japan Cup International Gymnastics Competition which was held in Tokyo, Japan, were carefully analyzed based on difficulties, group performances and start values and the following results were found. First, because the revised Code of Points allows only 10 difficulties for being added to scores, the number of difficulties included in scores out of the whole performances was 10.00±0.00 on average, Difficulty A was performed by 2 players, which indicates that difficulty A does not play an important role in improving start values. Second, for performance contents, 3 techniques of difficulty B were performed by a total of 4 plays and 6 techniques of difficulty C were performed by a total of 8 players. This showed that although both difficulties do not play an important role in improving start values, they reduce deductions, thereby improving final scores. Third, for performance contents, difficulty D was most preferred by all players. For performance compositions, minimizing deductions in exercising the techniques of difficulty E and completely exercising the techniques of difficulty D were important to get excellent results in international competition. Fourth, the techniques of difficulty E or over, of which rate of mistakes is high, should completely be Performed to minimize deductions and win a medal under the revised rules of game which have wider range of deductions than before.

초등학교 고학년 남학생의 자아탄력성이 학교생활적응에 미치는 영향

최영철(Choi, Young-Chyul),정구영(Jung, Goo-Young),이준우(Lee, Jun-Woo) 한국체육과학회 2015 한국체육과학회지 Vol.24 No.6

This study was to examine on the basis of the impact of self-elasticity on school life adaptation of the senior elementary school male students whether the participation in physical activity in the form of after-school Taekwondo was acting as an adjustment variable in the relationship between them. To do this, the data were collected from 327 elementary school male students in the 5-6th grade and they were divided into groups by whether they participated in Taekwondo activity or not. In addition, the statistical analysis SPSS 18.0 and AMOS 18.0 program were used in order to solve the study problem presented in this study. As for the confirmation of the normality of the general characteristics and data of the subjects, descriptive statistics and correlation analysis were conducted and the verification of reliability were identified by exploratory factor analysis and Cronbach"s α . Finally, for α the impact of the self-elasticity of senior elementary school male students on school life adaptation and for the verification of the adjustment effectiveness of after-school Taekwondo training participation, a structural equation model was applied. Conclusions obtained from these procedures are as follows. First, the higher the self-elasticity of elementary school male students was, the higher the school life adaptation was. Second, the after-school Taekwondo activity was acting as an adjustment variable in terms of the impact of self-elasticity on school life adaptation as it showed higher influence on the subjects than on the male students who did not participate. Since enhancing the school life adaptation of the elementary school students was a policy that could raise the feeling of happy school life, a general conclusion was reached that enhancing self-elasticity and participating directly in physical activities such as Taekwondo could be helpful.

스쿼시 경기 기술 분석을 위한 평가도구 개발에 관한 연구

최영철(Choi, Young-Chyul),권태원(Kwon, Tae-Won) 한국체육과학회 2012 한국체육과학회지 Vol.21 No.3

The purpose of this study was to develop an assessment tool for analysis on squash game techniques with which training methods and game strategies can be established, based on specific data on strengths and weaknesses of each technical characteristic of athletes. The following conclusion was obtained. First, among 724 initially deduced questions from an expert group, a total of 129 questions for 7 technical valuation measures were selected for the final form of questionnaire by excluding 4 questions including, 2 drop questions and 2 drive questions among 133 subsidiary assessment items of 7 technical valuation measures. Removal of inappropriate questions was done by going through primary preliminary investigation, secondary actual investigation based on common reliability of normal athletes, and tertiary measure refining process. Second, actions and techniques during squash games were given a grade by classifying into five steps. Points of grades were selected as four points for Ace, three points for Strong, two points for Normal, one point for Weak and zero point for Error. Third, as basic motions of squash athletes that are divided into actions and motion techniques during games, 7 technical valuation measures including service, drive, volley, drop, lob, boast and reserve angle were selected by excluding volley boast, a technique for which the frequence of use was about once or twice a game. Overall reliability was extremely high at 0.939. Fourth, in order to adjust to the speed of technical actions during games, game analyst was allowed to use abbreviations such as S (service), D (drive), V (volley), P (drop), L (lob), B (boast), and R (reverse angle) and record 7 techniques in the forms of score-technique-grade. For example, the suggested recording method was to write down ‘1-S-0’ if an athlete performed a service that goes out of the court when he or she has one point.

고령여성의 복합운동이 활동체력 및 노화호르몬에 미치는 영향

최영철(Choi, Young-Chyul),김준동(·Kim, Jun-Dong) 한국체육과학회 2015 한국체육과학회지 Vol.24 No.5

This study intended to survey the influence of the complex exercise of aged women on functional fitness and aging hormone. To answer to this survey, the exercise was performed on the complex exercise group which composed the program based on the walking, band resistance exercise, control group based on exercise for 12 weeks, 4 times a week and for 60 minutes each time. The functional fitness, aging hormone were tested for before the participation in the exercise program, after 12 weeks. And, technical statistics was used for the summary of measurable variables about the two groups and the two-way repeated ANOVA was utilized to verify the effect after handling with the exercise program. The following result has been obtained through this procedure. First, functional fitness show significant interaction effect depending on the complex exercise. But, balance not show significant interaction effect depending complex exercise. Second, aging hormone show significant interaction effect depending on the complex exercise. But, melatonin not show significant interaction effect depending complex exercise. But in the technical statistics, there showed an increase in the complex exercise group.

A Study on the Difference of the Agility from Competitive to Non-competitive Treatments

최영철(Choi, Young-Chyul),권태원(Kwon, Tae-Won) 한국체육과학회 2011 한국체육과학회지 Vol.20 No.5

이 연구의 목적은 여자대학생들을 대상으로 경쟁에서 비경쟁상태로의 변환조치가 민첩성(전신반응과 행동시간)에 어떠한 차이를 주는 가를 알아보기 위한 실험이다. 개인의 경쟁과 2명의 짝이 상호 경쟁 상태를 이루는 상태에서 민첩성의 효과를 규명하고 이를 비경쟁상태로의 변환처치의 두 과정이 민첩성에 변화가 있는가를 조사하기 위해 실험을 하였다. 연구자는 다음과 같은 결론을 얻었다. 1. 개인 간의 경쟁상태가 2명이 짝이 상호 경쟁 상태를 이루는 상태보다 민첩성에 더욱 효과가 있었다.(p<.05). 2. 개인 과 상호 짝을 이룬 경쟁 상태에서 실험 후 비경쟁상태로의 변환 처치 시 민첩성(전신반응)에 유의한 차이를 보였다.(p<.01). 3. 개인의 경쟁 상태에서 실험 후 비경쟁상태로의 변환 처치 시 민첩성(행동시간)에 유의한 차이를 보였다.(p<.01). 4. 상호 짝을 이룬 경쟁 상태에서 실험 후 비경쟁상태로의 변환 처치 시 민첩성(행동시간)에 유의한 차이를 보이지 않았다.(p>.05).

골프 숙련자와 비 숙련자 간 시각적 거리측정 능력에 관한 연구

최영철(Choi, Young-Chyul),정승일(Jung, Seung-Il),권태원(Kwon, Tae-Won) 한국체육과학회 2016 한국체육과학회지 Vol.25 No.1

The present study was conducted on 14 professional golfers and 10 amateur golfers to analyze difference of visual distance finding ability between skilled golfer and unskilled golfer and investigate the correlation between the distance finding ability and exercise capacity. Walking Counter-Professional was used for distance finding and Bushnell Pro X7 laser distance finder was also used additionally. The goal for visual distance finding was set as 45m, 55m, 60m, 80m, and 95m, and measurement was made 5 times for each goal, a total of 25 times repeatedly. As for statistical process, mean and standard deviation by subject for all scores were calculated and independent t-test was used for comparison between the groups. Finally, the following results were extracted. First, skilled golfer group showed an error distance lower by 8.77m than unskilled golfer group in visual distance finding for 45m. Second, skilled golfer group showed an error distance lower by 9.52m than unskilled golfer group in visual distance finding for 55m. Third, skilled golfer group showed an error distance lower by 7.69m than unskilled golfer group in visual distance finding for 60m. Fourth, skilled golfer group showed an error distance lower by 8.74m than unskilled golfer group in visual distance finding for 80m. Fifth, skilled golfer group showed an error distance lower by 11.81m than unskilled golfer group in visual distance finding for 95m.

골프 샤프트 특성에 따른 드라이버 스윙 시 골프 볼의 역학적 구질과 인적특성과의 관계

최영철(Choi, Young-Chyul),김태완(Kim, Tae-Wan),심광보(Shim, Kwang-Bo),최봉암(Choi, Bong-Arm) 한국체육과학회 2016 한국체육과학회지 Vol.25 No.5

This study made measurements in terms of ten different kinds of 50g S shaft with different kick points using the VAS e valuation form a nd Trackman P ro t argeting 2 0 sub jects in t otal t hat consisted of 1 0 professional players of Korea Professional Golf Association (KPGA) and 10 professional players of Korea Ladies Professional Golf Association (KLPGA) in order to suggest the subjective assessment felt by professional golfers and the mechanical properties of golf balls, and as a result, the following conclusions were drawn: First, the degree of satisfaction felt by male professional players on the shaft currently in use was 8.30 point on average and at least 5.5 points and up to 6.8 points on the experimental shaft while, in the case of female professional players, the degree of satisfaction on the shaft currently in use was 7.56 point on average and at least 5.33 points and up to 6.78 points on experimental shaft. Second, the weight of the shaft currently being used by male professional players was 64.80g on average with the intensity of average X while the female professional players used 52g shaft with the intensity of average SR. The weight subjectively felt by male professional players per each shaft was at least 53.5g up to 63g while at least 53.89g and up to 57.78g for female players. Third, the mechanical property ( swing speed, b all speed, smash f actor, launch angle, height of b all and driving distance) of golf ball between the shafts at the driver swing by male professional players did not show statistically significant difference, however, in the case of female professional players, significant difference appeared in smash factor with p>.000, consequently, a post-hoc analysis followed, and it was revealed that an increase in smash factor was induced at the time of using the experimental shaft as could be seen from the results such as p>.047 with # 1, p>.022 with # 3, p>.006 with # 7, p> 0.018 with # 8, and p>.014 with #10 among the shafts currently in use and experimental shafts.

스쿼시 남자단식 우수선수의 경기기술 분석에 관한 연구

최영철(Choi, Young-Chyul) 한국체육과학회 2013 한국체육과학회지 Vol.22 No.4

In this study, elite players who played in and won 2011-2012 world championships and international competitions were analyzed: 12 tournaments of 4 competitions (46 games including finals, semi-finals, and quarter-finals). This study aims to provide basic data for establishing strategies and training methods based on the detailed data by analyzing the skills which players attempted in the real game to make a score and identifying strengths and weaknesses of the skills. The results of analysis were as follows: First, among the total 7,059 skills attempted in games, 4,456(63.1%) backhands and 2,603 forehands were attempted, and with regard to the drive which is a basic technique, BD and FD accounted for 34.1% and 16.8% respectively. Scoring rates on backhand in descending order are as follows: BD(20.0%), BV(19.8%), BP(16.3%), FV(12.3%), and FP(11.0%). Loss rates on backhand in descending order are as follows: BD(19.6%), FD(16.7%), BV(13.2%), BP(12.3%), and FV(10.4%). Second, scoring rates of winning games in descending order are as follows: BV(20.7%), BD(20.5%), BP(16.1%), FV(12.6%), and FP(10.4%), and the rates of technique level 3 (Strong) in descending order are as follows: BD(32.9%), FD(20.2%), BV(16.7%), and BP(10.0%). The rates of technique level 1 (Weak) in descending order are as follows: BD(34.0%), FD(18.9%), BV(9.4%), and BP(9.4%), and loss rates in descending order are as follows: BD(19.8%), FD(15.5%), BV(13.5%), and BP(12.1%). Third, scoring rates of losing games in descending order are as follows: BD(17.4%), BP(17.4%), BV(14.5%), FP(14.4%), FD(11.5%), and FV(10.1%), and the rates of technique level 3 (Strong) in descending order are as follows: FD(41.7%), BD(25.0%), FV(16.7%), BP(8.3%), and BV(8.3%). The rates of technique level 1 (Weak) in descending order are as follows: BD(30.4%), FD(17.4%), BV(13.0%), FP(8.7%), FS(4.3%), BL(4.3%), FL(4.3%), and BB(4.3%), and loss rates in descending order are as follows: BD(22.7%), FD(20.0%), BV(12.7%), FV(9.0%), BP(8.1%), BB(8.1%), FP(6.3%), and FB(4.5%).

스크린골프 이용객의 성별에 따른 선택속성 척도의 잠재평균분석

최영철(Choi, Young-Chyul),정우진(Jung, Woo-Jin) 한국체육과학회 2015 한국체육과학회지 Vol.24 No.4

This research eventually aims at building up an academic foundation to provide proper information at a time when how to boost a screen golf course is approached from the viewpoint of selection attributes. In other words, this research checked out whether the yardstick for selection attributes can be commonly used to both male and female. In order to do so, this research analyzed that point by applying a statistics program to it, after collecting data by using the yardstick for selection attributes to a total of 391 individuals who visited a screen golf course. As a result, the sameness of type-measurement-segment-factor dispersion were all established through collected data, and while differences of potential average analyses were drawn from the service of selection attributes and the program factors, it turned out that there were few meaningful effects of differences, which led us to conclude that information gained from all the users, male and female, is a suitable criterion to be commonly used to any customer. Namely, we came to a final conclusion that it is free from problems to provide information from the viewpoint of generalization after breaking down all the information by an identical method, regardless of the sex of each lower factor of the yardstick for selection attributes. Nevertheless, more studies should be conducted which takes into consideration other individual characters such as age and career except for sex so that screen golf courses can be brisk, and vertical studies are also needed in order to exactly diagnose by means of changes in selection attributes.

남자 우수 스쿼시 선수의 신체 형태학적 특성에 관한 연구

최영철(Choi Young-Chyul),권태원(Kwon Tae-Won) 한국체육과학회 2006 한국체육과학회지 Vol.15 No.3

The research is performed to define the difference of morphological features according to the physical state of athletes who show dissimilar performance in games, and to state the morphological features of excellent players. Measurement was made to 107 subjects who are all squash athletes, and the categories include differences of height, weight, hypodermic fat thickness, girth, width, and length. Also, human body measurement index was used to estimate the amount of body fat, muscle mass, bone mass, proportions of waist and hip, and the volume index. The collected data of technical statistics was used to define the morphological features of excellent athletes, and one-way ANDVA was used to prove that the difference of morphological features is due to the performance in games. The result of the research is as follows: First, there was significant difference in hypodermic fat thickness and height according to different performance of squash players at the level of p<.05. In particular, excellent players showed better height, and low hypodermic fat thickness compared to ordinary players. Second, there was significant difference statistically in foot length according to the level of performance at p<.05. Third, there was significant difference statistically in the upper arm bone and waist according to different level of performance at p<.05. Fourth, there was significant difference statistically in the front thigh, legs, shank bone at p<.05. However, excellent players showed longer physical length overall compared to ordinary players. Fifth, there was significant difference statistically in the percentage of body fat and BMI according to different level of performance at p<.05. In particular, excellent players showed lower body fat percentage, BMI, and WHR compared to ordinary players, but the muscle mass and bone mass was higher than ordinary players.