Disciplinary Session 9 / Sport Biomechanics / Development and Method in Sport Biomechanics Study : 다목적 구간속도 측정 시스템 개발

성낙준,권영후,곽창수 ( Rak Joon Sung,Young Hoo Kwon,Chang Soo Kwak ) 한국체육학회 1998 국제스포츠과학 학술대회 Vol.1998 No.2

클럽의 길이 변화에 따른 골프 스윙의 지면반력 변화

성낙준 ( Rak Joon Sung ) 한국운동역학회 2007 한국운동역학회지 Vol.17 No.2

세계 태권도연맹 경기규정 개선안의 개선 방안

성낙준 ( Rak Joon Sung ) 세계태권도학회 2001 세계태권도학회지 Vol.5 No.0

지면반력분석기를 이용한 골프 스윙의 분석 평가 방법

성낙준 ( Rak Joon Sung ) 한국운동역학회 2010 한국운동역학회지 Vol.20 No.2

The purpose of this study is developing a method to analyze and evaluate a golf swing motion using the ground reaction force (GRF) data. Proper weight shifting is essential for a successful shot in golf swing and this could be evaluated by means of the forces between the feet and ground. GRF during the swing were measured from 15 low-handicapped male golfers including professionals. Four clubs(driver, iron 3, iron 5, and iron 7) were selected to analyze the differences due to different characteristics of club. Swings of each subject were taken using a high speed video camera and GRF data were taken simultaneously by two AMTI force platforms. To simplify the GRF data, forces of the three major component of GRF(vertical, lateral, anterior-posterior force) at 10 predefined temporal events for each trial were selected and the mean of each event were calculated and evaluated. Analyzed vertical GRF (VGRF) data could be divided into two different styles, one-legged and two legged. One-legged style shows good weight transfer to the target leg and most of the previous study shows this style as a typical pattern of good players. Therefore the data from the iron 5 swing obtained from 10 one-legged style golfers are provided as criteria for the evaluation of a swing.

태권도 격파의 역학적 원리

성낙준 ( Rak Joon Sung ) 세계태권도학회 2001 세계태권도학회지 Vol.5 No.0

인체 구조와 기능에 근거한 태권도 기술의 체계화 방안

성낙준 ( Rak Joon Sung ) 국기원 2011 국기원태권도연구 Vol.2 No.2

본 연구에서는 인체 구조와 기능에 근거한 ``통합된 하나의 태권도 기술 체계도``를 정립하였으며, 이 체계도에 의해 기존에 서기, 방어, 공격으로 분류했던 총 355개의 기술들을 새롭게 분류하였다. 최상위 분류는 인체의 구조에 따라 팔 기술, 다리 기술, 몸통 기술의 3가지 유형과 발을 이용하여 몸을 이동하는 이동법의 4가지로 분류하였다. 각각의 기술들은 다시 인체의 기능에 따라 세분하였다. 팔 기술(손기술)은 뻗기, 비틀어 뻗기, 비틀어 휘돌리기, 휘돌리기, 수평회전의 5가지 유형으로 분류하였으며, 기타 팔 동작들은 팔꿈치치기, 잡기, 넘기기, 빼기, 복합동작으로 분류하였다. 다리 기술(발기술)은 뻗기, 비틀어 뻗기, 구부리기, 휘돌리기의 4가지 유형으로 분류하였으며, 나머지는 무릎치기와 복합 동작으로 분류하였다. 몸 기술(신법)은 몸 낮추기, 비틀기, 앞뒤-좌우로 숙이기, 휘돌리기의 5가지로 분류하였다. 이동법(보법)은 서기, 걷기, 뛰기, 돌기, 뛰어 돌기의 5가지로 분류하였다. In this study, an integrated scheme for all Taekwondo techniques was established based on the structure and function of the human body. A total of 355 techniques which had been classified into three categories by the Kukiwon - stance, defense and attack techniques - were newly classified by this new scheme. Based on the structure of the human body, the top-level classification was divided into four categories: arm, torso, leg, and moving techniques. Techniques belonging to each category were further subdivided according to the functions of the human body. Arm techniques (hand techniques) were classified into five basic types of motion: extension, extension with a twist, circumduction with a twist, circumduction, horizontal rotation, and five others - elbow striking, grasping, throwing down, pulling out, and complex motions. Leg techniques (foot techniques) were classified into four basic types of motion: extension, extension with a twist, flexion, circumduction and two others - knee striking and complex motions. Body techniques were classified into five basic types of motion: lowering, twisting, side bending (bobbing), flexing and extending (weaving), and circumduction. Moving techniques (footwork) were classified into five basic types of motion: stance, walking, jumping, turning, and jumping turn.

다기능을 갖는 아마추어 복싱 컴퓨터 채점기의 개발

김효정 ( Hyo Jeung Kim ),한광록 ( Kwang Rok Han ),성낙준 ( Rak Joon Sung ) 한국스포츠정책과학원(구 한국스포츠개발원) 2005 체육과학연구 Vol.16 No.1

본 연구는 아마추어 복싱에서 심판들의 판정을 감시하기 위한 컴퓨터 채점기의 개발에 관하여 논한다. 심판들의 편파적인 판정을 방지하고 심판들의 판정 행위를 감시하기 위하여 스파이 카메라를 이용한다. 매 경기마다 심판들의 개별 입력 데이터와 승인된 점수를 비교하고, 분석하여 각 심판들의 판정이 평가된다. 본 시스템은 제13회 세계 청소년 아마추어 복싱 대회를 통하여 충분히 검증을 받았으며, 그 결과 심판들의 판정에 대한 신뢰성이 향상되었다. 또한, 본 컴퓨터 채점기는 복싱 경기의 데이터를 전산화하고 분석함으로써 선수들의 경기력 향상에도 크게 기여할 것으로 기대된다. We discuss the development of a computer scoring machine that monitors judges` decisions in amateur boxing. A spy camera was used to prevent judges` biased decision and to monitor their judgment activities, and judges` decisions were evaluated for each match by comparing and analyzing data input by the judges and scores approved. The system was fully tested by applying to the 13th World Junior Boxing Championships and, as a result, the reliability of judges` decisions was improved. In addition, as data on boxing matches are computerized and analyzed, the system is considered to contribute to the enhancement of boxers` performance in their matches.

높이뛰기의 바 넘기 동작을 위한 각운동량 분석

성낙준 한국운동역학회 2004 한국운동역학회지 Vol.14 No.3

R. J. SUNG. Analysis of the Angular Momentum for the Bar Clearance Motion in the Fosbury Flop. Korean Journal of Sport Biomechanics, Vol. 14, No. 3, pp. 119-134, 2004. The purpose of this study was to analyze the angular momentum characteristics of the Fosbury Flop high jump and the role of the body segments for the production of 3 angular momentum components. The subjects were three male jumpers who were former Korean national team players. Their jumping motions were analyzed using the DLT method of three-dimensional cinematography. The conclusions were as follows. 1. All the forward angular momentum needed to clear the bar was created in the take-off phase. Take-off leg was the great contributor of the forward angular momentum. On the other hand, free leg produced large opposite angular momentum. 2. All subject had some lateral angular momentum before the take-off phase. Head and free leg had major contribution to the lateral angular momentum production. Take-off leg produced opposite angular momentum. 3. All subject had some twisting angular momentum, which make the back of the athlete turn to the bar, before the take-off phase. Free leg was the major contributor of the twisting angular momentum. Head and trunk was the second contributor of the twisting angular momentum. 4. Total angular momentum needed to clear the bar had no significant correlation to the jumping height. 5. Subject who made excessive angular momentum showed different pattern of angular momentum production and had a poor record compared to other subject.

운동역학의 교육과 연구용 도구로서 Mathcad의 유용성

성낙준 한국운동역학회 2004 한국운동역학회지 Vol.14 No.3

R. J. SUNG. Mathcad program as a useful tool for the teaching and studying the sport biomechanics. Korean Journal of Sport Biomechanics, Vol. 14, No. 3, pp. 301-311, 2004. The purpose of this study was to verify the usefulness of the Mathcad program as a tool for the studying and teaching the sport biomechanics. A projectile motion was analyzed because it is the one of the most popular motion in sports activities. A 3 dimensional CG data for the high jump bar clear phase was used to calculate the initial velocity vector of the CG. Linear regression function and other functions such as cubic spline and derivative of Mathcad were used to calculate this vector. Finally, the approach angle to the bar and peak jump height was calculated. Programming in Mathcad was relatively easy compare to traditional computer language such as Fortran and C, because of the unique documentation method of Mathcad. Additionally the 2 and 3 dimensional graph function was very easy and useful to describe the mechanical data. If the use of Mathcad program is more popular in the field of sport biomechanics, it could greatly contribute to overcome the limit of research caused by the lack of proper programming ability.

골프 클럽의 스윙궤도와 스윙면에 대한 고찰

성낙준 한국운동역학회 2004 한국운동역학회지 Vol.14 No.1

R. J. Sung. A Study on the Swing Path and Plane of the Club in Golf Swing. Korean Journal of Sport Biomechanics, Vol. 14, No. 1, pp. 99-115, 2004. In order to know the correct swing methods in golf swing, it is important to understand the whole swing path but also the concept of swing plane. But, most amateur golfers don't know the concept of swing plane well. Therefore this study was trying to make a good material that makes the concept of swing plane easy to understand. A good swing motion data was obtained from a professional golfer using the three dimensional DLT method. This swing motion was divided into 10 phases and evaluated using the concept of swing plane. The result of the analyze show a good matches between the path of the club and swing plane. This result was summarized as a 3 dimensional graphics to provide a good material to teach the golf swing well.