Electromyography 기법을 이용한 육상 크라우칭 스타트의 하체 근 동원 비교분석

신성휴,박기자 한국운동역학회 2003 한국운동역학회지 Vol.13 No.2

Shin, S-H and Park, K-J. Electromyography Analysis of Muscle Activities of Lower limb for Crouching Start Technique. Korean Journal of Sport Biomechanics, Vol. 13, No. 2, pp. 115-122. The purpose of this study were to analyze the muscle activities and the characteristics of muscle recruting patterns of lower limb for crouching start technique using four elite sprint. The EMG technique was used to record muscle activities of both right and left sides of retus femoris, vastus medialis, biceps femoris, and gastrocnemius. Eight surface electrodes were placed on the surface of the selected muscles and one ground electrode was also attached on the back of neck(C7). One video camera was also used to recored the crouching start motion to define 6 events and 5 phases for further analysis. The raw EMG data were filtered with band pass filter(10-350) to remove artifacts and then low pass filtered(4Hz) to find the linear envelope which resemble muscle tension curve. This filter EMG data were normalized to MVIC for the purpose of comparison between right and left sides muscle. The results of this study were as follows. All four subjects showed that vastus medialis muscle activity was comparatively higher than those of retus femoris, biceps femoris, gastrocnemius. And left side of muscle activity was comparatively higher than right side of muscle activity. Therefore, when the subjects starting out crouching start position, we recognized that the muscle of lower limb showed interaction effect by each muscle.

골프 스윙동작의 운동학적 분석

신성휴,고석곤 한국운동역학회 2003 한국운동역학회지 Vol.13 No.2

Shin, S-H and Ko, S-K. A Kinematic analysis of Golf Swing Motion. Korean Journal of Biomechanics, vol. 13, No. 2, pp. 101-114. The purpose of this study was to examine the major kinematicak variance to increase the club head velocity during the driver swing two PGA prp-golfers utilizing 3-dimensional image analyzing linear velocity of the club-head during the impact quantiatively. To achive these purpose, two high speed camera in 120 field/s and one high-speed camera in 500 field/s were used in this study. The program made by Younghoo Kwon(1944) was used to analysis the digitalization of reference point, digitalization of joint venter, synchronization, calculation of 3-Dimensional coordinate by DLT method, and smoothing. Through this study, the conclusions are as follow. 1. During the driver swing, in the percentile of the total time, two pro-golfer showed 0.925,0.929 second from adress to top-swing, 0.236,0.929 second from top-swing to impact. 2. During the driver swing in the displacement of the center of the body, two pro-golfer showed 45.3,45.23% from adress, 44.3,44.24% from impact. 3. In the velocity variance. The maximum blub-head velocity two pro-golfer showed 43.36,43.24m/s respectively the down swing. The ball velocity showed 63.12,63.06m/s. 4. In the rotational angle of the shoulder joint, two pro-golfer showed -13.5,13.53°during the back swing respectively. Two subject adressed opening status og upper body. 5. In the rotational angle of the right knee angle showed 156.3,154.7°from the adress.

Electromyography 기법을 이용한 씨름 덧걸이 기술의 상체 근 동원 비교분석

신성휴,임영태,김태완,박기자,권문석 한국운동역학회 2003 한국운동역학회지 Vol.13 No.1

Shin, S-H · Lim, Y-T · Kim, T-H · Park, K-J and Kwon, M-S. Electromyographical Analysis of Muscle Activities of Upper Trunk for Ssireum Dutguri Technique. Korean Journal of Sport Biomechanics, Vol. 13, no. 1, pp. 95-108. The purposes of this study were to analyze the muscle activities and the characteristics of muscle recruiting patterns of upper trunk for Ssirum dutguri technique using three top-ranked elite Ssirum players. The EMG technique was used to record muscle activities of both right and left sides of latissimus dorsi, biceps brachii, and erector spinae. Six surface electrodes were placed on the surface of the selected muscles and one ground electrode was also attached on the back of neck(C7). One video camera was also used to record the Ssirum motion to define 4 events and 3 phases for further analysis. The raw EMG data were filtered with band pass filter (50-400 Hz) to remove artifacts and then low pass filtered (4 Hz) to find the linear envelope which resemble muscle tension curve. This filtered EMG data were normalized to MVIC for the purpose of comparion between the subjects. The results were indicated that each subject with different physical characteristics showed very different muscle activity patterns. Although Ssirum dutguri is considered as foot technique the player grasped opponent's satba(belt) with both hands when they play. Because of this reason, activities of upper trunk muscles were relatively high. However, direct comparison between upper and lower body muscles was not possible due to the lack of the data in present study. Interestingly, all threes subjects showed that erector spinae muscle activity was comparatively higher than those of latissimus dorsi and biceps brachii. This implies to reinforce back muscle as a routine of training to improve performance or to prevent back injury. implies to reinforce back muscle as a routine of training to improve performance or to prevent back injury.

柔道技術 중 허벅다리걸기의 運動學的 特性

신성휴,손명성,김원섭,최승필 한국운동역학회 1998 한국운동역학회지 Vol.8 No.2

This study has been aimed to analyze UCHIMATE technique of Judo gymnastically. The following are the results and the proposition obtained through an image analysis method 3 men half heavy weight champions of the national Judo standing team(85-95kg) were used as subjects for the study. 1. CONCLUSION The following are the conclusion obtained through the discussion of analysis results of the Uchimata technique using 3 men, half heavy weight(85-95kg) champions of the National standing Judo team. 1) The time performing total technique were 1.48-seconds which was performinglonger than the light heavy weight class of 1.28-seconds by 0.20-seconds, this showed that the heavy weight class players demonstrated the technique later than the light heavy weight class palyers. 2) The average length of moving 1-step leg for attacking was 24.27cm, and 2-step leg moving was 92.87cm on average. Therefore, the shorter the moving distance, the more the technique performing hour could be shortened. 3) In the hanging phase, the moving displacement of the center of gravity of the body weight showed in horizontal, vertical, right and left direction 28.97cm, 21.59cm and 13.57cm respectively. Each of which were longer than the phase of KUZUSHI and TSUKURI. Such results show that the center of gravity of the body in move lift the opponent. This reducing the displacement of body weight from the center toward the right and left direction in the phase of KAKE is considered to be effective in demonstrationg the technique. 4)The central speed of the body was 0.8cm per second on average and the average vertical speed was 0.74cm per second. The speed of right and left movement was 0.51cm per second on average which showed the horizontal speed was the fastest while it is preferred that the vertical speed should be faster than that of the horizontal. 5) Angle of the Trunk showed 98.13 ˚ on average in the hanging phase and the larger the trunk angle, the shorter the needed time to demonstrate the technique, thus making the throw of the opponent over shoulder more advantageous. 2. PROPOSTION The following propositions are suggested through this analysis for further study : 1) It is to be considered that the kinetics in hanging the thigh and the degree of every segment of the body be studied in a more detailed fashion. 2) A study on the technique of thigh hanging in an actual game situation (rather than during mere exercises) is necessary. 3) It is necessary to study the TORI and UKE techniques together. 4) The study of each weight class ought to be performed.

Bowling 투구 動作分析

신성휴,위승두,손명성,구희성 조선대학교 스포츠과학연구소 1998 스포츠科學硏究 Vol.9 No.-

The Purpose of this study is the provide basic data for bowlers by analyzing the kinematical variables of throwing motion to the male pro bowler using 3-dimensional image analysis method. This researcher took the pictures with a video camera, analyzed them using the Kwon 3D program. 1×4×2m control object installed to get a 3 dimensional space coordinates. Results were as follows. 1. It was indicated that the trunk angle did not change left and right. Back and forth from stance to release motions of three subjects, and the average angle of trunk angle at the stance and that at the tabular side were 19.5˚ and 14.6˚ respectively, which showed they did not deviated from well-known range of forward direction, 15-20˚ and lateral direction 10-15˚. Also the trunk angle of release motion was average 17.1˚ for thalamus side, 41.3˚ for tabular side. 2. It was indicated that the knee angle repeated the increase and decrease to a small degree from the first to the fourth phase, the average angle of left knee at the release motion, the sixth phase was 110.8˚, which was higher than generally known 90˚.

High Hurdle의 기능학적 분석

申性休 成均館大學校 1983 論文集 Vol.33 No.-

I made the three male Hurdlers of Korea(our country) in the 110m Hurdle Race as subjects of my research. I could come to the conclusion as follows, from the anlysis of the developed films by taking photographs of First Hurdling with 16mm and 8mm Movie Camera (64 Frame/sec, 70 Frame/sec). 1. The center of gravity moves to the left while they are hurdling, but it turns back to the original point after the go over the hurdle. 2. When hip joint is high, the horizontal distance between hip joint and hurdle is from 21.1 to 26㎝, and that distance is shorter than 30㎝ which was reported by Mr. Kim Won Yong. 3. Although the hurdling time was recorded as from 0.6248sec to 0.6532 sec, that was the later time 0.495-0.593sec which was reported by Terry and Daniel. 4. The horizon shifting distance of the center of gravity in hurdling was 4.15-4.724M, and it was appeared the distance was longer than 4.17M-4.52M reported by Terry and Daniel. 5. The horizon velocity of center of gravity was between 6.3533m/sec and 7.3928m/sec. If the above velocity is conpared with the velocity. 8.3735-7.2491m/sec shown by Terry and Daniel, it was shown that there were great difference between the velocity appeared in my research and that of Terry and Daniel.

우리나라 綿織物의 史的 考察

임성휴,신인수 圓光大學校大學院 1996 論文集 Vol.17 No.-

This thesis studied among India, the cradle of cotton fabric culture, its outskirts eastern Asia, China, Korea and Japan, mutual relations of cotton fabric cultural formation and the development process of cotton fabric production. The cotton fabric culture originated from India about 2500 B.C. and spread to Asia including Korea, Europe and throughtout the world. It also had developed and settled according to the trait of those regions. It was in 1362, the twelfth1 year of King Kongmin, at the end of Koryo dynasty that Mun Ic-Jeom brought into cotton seeds from the Won Country (one of Chinese dynasties) however in the three-kingdom age as people traded with those of Min (민)(Bok Gun Sung, 福建省) and Kwang(廣)(Kwang Dong Sung, 廣東省) provinces of China, they was able to product 'Baik chup po(白疊布·白첩布, a kind of textile)' with brought-in cotton from China by using their skill of fine cotton-spinning. Baik chup po was sent to China as a tribute in three-kingdom rige and Koryo dynasty on the other side Baikjae dynasty sent 'Baik Myun(白綿, a kind of cotton fabric)' to Japan and affected the Japan cotton fabric culture. In Chosun age cotton fabrics became universal and ranked as main cloth, but they were collected severely as taxes and there were a variety of prohibitive measures of clothes according to their social positions. The cotton fabric industry didn't come to develop qualitively and stayed at a domestic hand-operating industry until the late of Chosun dynasty. For those reasons in the enlightened age, it declined Chosun textile manufacturing company in 1917 due to excellent (superior) imported cotton fabrics but as Kyungsung textile manufacturing company in 1919 were established, gradural cotton-production industrialization started. After that our country's cotton industry developed consecutively and in the 1960's it made a great contribution to the development of nation economy. In the 1990's as the stage of automatization on the one hand they try to promote productivity and the other hand, according to developed countries' diversification and differentiation trends they make effors to develop the advanced new material.

좌표변환 방법에 의한 분절의 각운동량 방정식 유도

이순호,정철정,신성휴,강성철 한국운동역학회 1998 한국운동역학회지 Vol.8 No.2

In this study, an equation of angular momentum was induced with the determination of the inertia tensor of a lower leg segments 3-dimensional space by translating global and local reference systems. Following conclusions were come out of calculating the angular momentum of a segment in dwihoolro-chagi skill in Taekwondo. 1. The maxumum value of total angular monentum on a lower leg segments was presented in extension phase with a value of 1.49L, and it was similar to angular momentum changes on a thigh segment. Angular momentum of every factors on lower leg segments showed a continuing increse from initiation of a motion to the final hit. A negative peak was achieved at pre and post TO in LY of a shank. 2. The usefulness of the inducement of an equation of angular momentum by the translation of reference in this study was verified with an application of it to the calculation of angular momentum in dwihoolro-chagi skill in Taekwondo.

Limiting Weather Factors on Yield and Their Interactions in Soybean

Shin Seong-Hyu,Park Keum-Yong,Lim Sea-Gyu,Shin Sang-Ouk,Ha Tae-Joung,Yun Eul-Soo,Suh Duck-Yong,Cho Sang-Kyun 한국작물학회 2006 한국작물학회 학술발표대회 논문집 Vol.2006 No.-

Kinematical Analysis of Starting Phase in 500m Short Track Speed Skating

( Sung Hyu Shin ),( Jin Ho Back ) 한국운동역학회 2005 한국운동역학회 논문 영문초록집 Vol.2005 No.-