농촌지역 청소년층의 체격과 영양상태에 관한 종단적 (縱斷的) 연구

정락희 한국보건통계학회 1982 한국보건정보통계학회지 Vol.7 No.1

A study on 1669 (Boys: 887, Girls: 782) middle and high school students in a rural area, Kyung-gi, province was conducted for assessing their physical growth, development and nutritional status from May 1, to May 30, 19, and the following results were obtained. A. Physical Growth and Development Ⅰ. Maximum growth was seen during the period from 12 to 15 years of age. Ⅱ. The greatest individual difference in growth and development were observed during 12-15 years of age for male and female. Ⅲ. The standards of growth of rescent rural Korean students show much improved than that of 1967. B. Various Indices about Physical Growth and Development. Ⅰ. Relative body weight was increased steadily annually. The lineal increase was indicated in both sex groups belonging to the age 112-16. Ⅱ. Relative chest-girth showed narrow chest style in both sex group from 12 to 15 and normal chest style after 15 year of age in both sex group. Ⅲ. The average relative sitting height was 54.0 in both sexes. Ⅳ. Rohrer index was increased steadily annually, 117-125 for male and 117-140 for female. Ⅴ. Kaup index was showed below 200 to 12 years of age for male and 13 years of age for female. Kaup index was showed normal range of the index over 200 after 13 years of age for male and 15 years of age for female. Ⅵ. Vervaeck index was showed the range of 79-89 in male and 79-88 in female. Ⅶ. The values of Pelidisi index of the nutritional status were obtained between 91-93 for male and 90-94 for female.

골프 퍼팅시 백스윙의 거리에 따른 볼의 이동거리 변화 연구

鄭樂喜 韓國體育大學校 1992 論文集 Vol.15 No.-

The study aimed at analyzing the data form the film taken with a high speed camera when subjects were performing various golf putting motions, including the distance of the take -away of the golf club, the addressing motion of it the forward swing motion of it, the impact motion of it, and the follow-through of it. The three subjects were employed for the study. The results of the study were as follows: 1. The speed of the club head in performing the impact motion. The speed of the club head, in performing the impact motion of the club, was increased, according to the progressive augmentation of the club's take-away distance by Five inch (1.207m/s), 10 inch(1.365m/s), and 15 inch(1.653m/s). 2. The maximal speed of the ball (MSB) In the cases of the club's take-away distance, MSB of Five inch was(1.520m/s) that of 10 inch was 1.5333m/s, and that of 15 inch was 2.033m/s. The results of them were not in direct proportion to those of the club's head speed. 3. The shift of center of gravity in body. when subjects were performing their golf putting motion the center of gravity in body moved to the horizontal direction by 0.7cm∼2.1cm, and to the vertical direction by 1.5cm∼1.7cm. 4. The moving distance of the ball by the club's take-away distance. The moving distance of the ball by the putter head's take-away distance demonstrated, large and small, various differences among subjects, but in case of the club's take-away by Five inch, the distance showed approximately 200cm, in case of it by 10 inch, it was 330cm, and 15 inch, 500cm. 5. Angels of upper Arms. If an angle of the right upper arm showed more than 167˚ in performing the take-away motion. the subjects indicated that they resulted in utilizing their hand wrist and were not fit in with the clockwise putting style. The study did not reveal that the consistent putting styles were not demonstrated. Also, if the least angels of the left upper arm were 180˚ on follow-through motion, such swing motions from the forward swing motion to the follow-through were considered as pendulum style putting stroke. In case of more than 180˚on such motions, they showed the evidence that they had used their hand wrist. 6. The speed of joint motion in upper limb and the speed of club head and ball in pendulum style putting stroke. The speed of upper limb and the speed of clubs head and the ball utilized by two subjects were as follows: 1) Two subjects (1st and 2nd)showed that the speed of their shoulder joint was connected to the follow-through continuously after their impact motion; 2) After the speed of their club heads showed the maximal power on the moment of the impact. On the ball, they had a tendency that they did not perform their follow-through and they had an immediate pause of their golf club head and then hit the ball; 3) They represented that the changing speed of their wrist joint and metacarpophangeal joint caused them to tend t utilize their wrist to hit the ball, which indicated their weak point Corresponding to many pausal club stroke. On the other hand, the third subjects demonstrated that the speed of the club head in performing the impact motion, tended to be consistent, and to increase progressively after the impact motion, in which he involved in such rational motion as pendulum style putting stroke.

흰쥐의 유영훈련이 골격근의 αㆍβ-MHC ·mRNA 농도에 미치는 영향

김복주,정락희 韓國體育大學校 1999 論文集 Vol.22 No.-

The purpose of this study is to investigate the changes of α·β-MHC·mRNA concentration in the skeletal muscles of rats after a 12-week swimming training. The 35 subjects, three weeks old Sprague-Dawley rats, were divided into five groups. The control group (n=7) lead a sedentary life during the whole training period, The rest of the four exercise groups had swimming training for 30, 60, 90, and minutes a day (five times a week), respectively. The gastrocnemius muscles were taken from the subjects, and α·β-MHC·mRNA was analysed by the northern blot method. The mean values and standard deviation were calculated and tested by Multiple ANOVA. The level of significance was set at the probability value of 0.05. In the gastrocnemius muscle, the concentration significantly (p<.01) increased, compared with the control group. The followings summarize the results : 1. The concentration of α·β-MHC ·mRNA increased in gastrocnemius muscles by way of endurance training. 2. The exercise duration effect may have existed in the concentration of α·β-MHC ·mRNA in the gastrocnemius muscles. As a result, the longer the duration of swimming training is, the more increased the concentration rate of α·β-MHC ·mRNA and synthesis protein leading to muscular hypertrophy. this study suggests that the application of swimming training to Marathon may be helpful in the performance improvement of Marathon.

태권도 겨루기 준비자세에 따른 앞돌려 차기 시간의 분석

丁局鉉,鄭樂喜 韓國體育大學校 1997 論文集 Vol.20 No.-

This study was under taken to identify the speed times among Free fighting stance Knee joint straighted stance, Knee joint bented stance, and Bouncing stance in TaeKwon-Do, by utilizing a high-speed camera(HSV 200 made from NAC Company in Japan), which will be able to take 200 frames per second. The 15 subjects employed for this study were selected form the Korean National TakKwon-Do players in 1995. In order to accomplish the purpose of this study, The data were analyzed with One-way ANOVA to determine the speed time of each stance. The results showed that there were statistical differences between the four stances each other. Therefore, to test the differences, Scheffe-test foe post-hoc comparisons was applied to the four dependent variables. The results of the study were as follows: 1. The Knee joint bented stance is the fastest motion(0.571 sec). 2. The Free fighting stance is the 2nd fastest motion(0.626 sec). 3. The Bouncing stance shows the 3rd rank of the fast motion(0.627 sec). 4. The last rank of the stance motion is the knee joint straighted stance(0.654 sec). According to the above-mentioned results, the implications of the study suggest that the Knee joint bented stance and the Bouncing stance will be applicable to the competition effectively, and especially, the Knee joint bented stance will be beneficial against the count-kick in the competition.

跆拳道 서기 姿勢에 따른 앞차기 技術의 力學的 分析(Ⅰ)

鄭樂喜,李腥國,申範澈 韓國體育大學校附屬 體育科學硏究所 1986 韓國體育大學校附屬 體育科學硏究所論文集 Vol.5 No.1

This statement summarizes the results of a study analyzing the Taekwondo Ap-Cha-Ki (front kick) at two positions, the standard “Kye-Roo-Ki”(Competition) posture and the normal walking posture. Two former welterweight Nation Taekwondo Athletes were the subjects of the study. Their “Ap-Cha-Ki” was analyzed by high-speed camere, body reaction gauge, shock gauge, and a force platform system. In “Ap-Cha-Ki” using the previously mentioned two postures, the following areas were noted: velocity, “Bal-Cha-Ki” (kick) execution time (reaction time and “Cha-Ki” (kick) time). Each foot joint angle of both feet Cha-Ki-Bal(kick foot) and the other foot sustaining body at the moment of impact on target shock power, net force, and maximum power. 1. The mean volocity in a distance reference, of “Ap-Cha-Ki” was 10.90m/sec and 9.67m/sec for each respective athlete at normal walking posture, which is faster than the 8.90m/sec and 9.60m/sec at the standard Kye-Roo-Ki posture. The maxium velocity was 11.50m/sec at normal walking posture. 2. The reaction time, “Cha-Ki”time, “Bal-Cha-Ki”execution time of “Ap-Cha-Ki”was faster at normal walking posture than the other posture. One athlete, Lee, C.K., marked 0.686 seconds(reaction time: 0.446 sec, “Cha-Ki”time:0.240 sec) at normal walking posture; 0.748 seconds(reaction time: 0.494sec,“Cha-Ki”time: 0.253sec) at standard Kye-Roo-Ki posture. The other athlete, Yang, D. S., Marked 0.628 seconds(reaction time: 0.365sec, “Cha-Ki”time:0.261sec) at normal walking posture; 0.642 seconds(reaction time:0.379sec, “Cha-Ki”time: 0.263) at standard Kye-Roo-Ki posture. 3. Shock power depends upon volocity of the kick and anle of each joint,especially foot joint at the moment of impact on target. The best results occur at 120。 to 124。of foot joint angle when there is an 80。angle between the geound and target. “Ap-Cha-Ki at normal walking posture has more shock power than at standard “Kye-Roo-Ki” posture. The former posture nets a maximum shock power of 583㎏s. 4. The net force of “Ap-Cha-Ki”at standard Kye-Roo-Ki posture was more powerful than the other, but only by 1㎏, which provides no definitive difference. The maximum net force was 699.9 N at standard Kye-Roo-Ki posture, velocity is not effected by net force. 5. The maximum power was 6304.0 Nm/sec at normal walking posture. However, there was no apparent difference between each posture. Maximum power correlates with volocity as follows; volocity is influenced by conditioning and reflexes. And the faster speed is, the more maximum power increases.

跆拳道 競技의 攻擊類型에 따른 得點變因과 失點變因 分析

鄭樂喜,李勝國,申鉉週 韓國體育大學校附屬 體育科學硏究所 1985 韓國體育大學校附屬 體育科學硏究所論文集 Vol.4 No.1

태국 북부 산족(라후족, 아카족)의 체질인류학적 연구 : 머리형태 계측을 중심으로

정락희,한승호 韓國體育大學校 1998 論文集 Vol.21 No.-

Department of Human Anatomy, Korean National University of Physical Education Department of Anatomy, College of Medicine, The Catholic University of Koreal Cephalometric dimensions of head of the Lahu(male 35, female44) and Akha(male 84, female 86) in northern Tailand, whose customs are similar to the Koreans, were measured and the indices of each dimension were calculated to identify the anthropological characteristics of these tribes. The results were as follows : According to the cranial index, the heads of the Lahu and Akha tribes were classified to mixed type. The same results were found in the face and nose. In the case of cephalometric height indices, these tribes had acrocranic and hypsicranic types of skulls. The high skull patterns of the Lahu and Akha corresponded closely to the aptterns of the Koreans.

유,무산소성 운동선수와 시신의 배곧은근 형태 분석

정락희 ( Rak Hee Chung ),방상식 ( Sang Sik Bang ),유승희 ( Seung Hee Yoo ) 한국스포츠정책과학원(구 한국스포츠개발원) 2004 체육과학연구 Vol.15 No.4

운동선수와 시신의 배곧은근 형태와 배벽동맥의 분지양상에 대한 형태구조를 평가하기 위하여 국가대표급선수(중·장거리달리기, 체조, 역도, 단거리달리기) 남자 38명과 시신 49구를 분석한 결과, 배곧은근의 길이는 운동선수와 시신 공히 키에 비례하여 신장의 1/5에 해당되었으며, 운동선수의 경우 배곧은근 길이는 유산소성 운동종목선수(중·장거리)가 무산소성 운동종목선수(체조, 역도, 단거리달리기)에 비해 절대적 길이는 길었다. 운동선수와 시신 간의 배곧은근 길이 절대값은 중·장거리 달리기선수군과 시신은 비슷하였으나 체조, 역도, 단거리달리기 선수군은 시신보다 짧은 것으로 나타났다. 배곧은근의 너비는 운동종목 특성에 따라 유의한 차이를 보였으며, 배곧은근의 상복부 너비는 중·장거리달리기선수군이, 중간복부는 역도선수가, 하복부는 체조선수가 가장 넓었다. 시신의 배곧은근 너비는 운동선수군에 비해 좁게 나타났으며, 운동선수 및 시신 공히 오른쪽이 왼쪽에 비해 상대적으로 넓었다. 배세모근의 형태는 시신의 경우 남·녀 대부분이 변이형태로 나타나며 높이는 남자가 여자보다 길었으나 너비는 비슷하였다. 나눔힘줄의 개수는 운동선수와 시신 공히 Type I(3개), Type II(4개)의 순이며, Type III(2개)의 비율은 매우 낮았다. 유산소성 운동종목선수군은 Type II(4개)의 비율이 높았고, 무산소성 운동종목선수군은 Type I (3개)의 비율이 높았다. 나눔힘줄의 모양은 첫 번째, 두 번째, 세 번째 것은 운동선수와 시신 공히 완전형이 가장 많았고, 네 번째 것은 체조, 역도, 단거리 달리기선수군의 경우 불완전형이 많았으나 중·장거리달리기선수군과 시신의 경우는 조각난 모양이 많았다. 시신의 경우 남자는 대칭되지 않고 연결된 형이 많은 반면, 여자는 대칭이면서 연결된 형이 많았다. 위배벽동맥의 직경은 시신의 경우 남·녀간 좌우측 차이가 없었으나, 깊은아래배벽동맥의 경우 남·녀 공히 우측이 좌측보다 굵었다. 위배벽동맥이 시작하는 부위는 남·녀 공히 Type I(배곧은근의 내측)이 가장 많았고, 다음이 Type II(중간)이었으나, 남자는 Type IV(2개의 구), 여자는 Type III(외측)가 관찰되지 않았다. 깊은 아래배벽동맥의 길이는 4cm 내외로 남자가 여자보다 길고 남·녀 공히 좌측보다 우측이 더 길었다. This study was performed in order analyze the structural characteristics of the gross structure of rectus abdominis muscle (RAM) and epigastric artery distribution of athletes and Korean cadavers. The length of RAM was reached at one-fifth relative to the height in both groups. No difference between aerobic type athletes (distance runners) and cadavers in the length of RAM, whereas was shorter in anaerobic type athletes (gymnasts, weight lifters, sprinters) than that of cadavers. Among the athletic group, the length of RAM in aerobic type athletes of distance runners was longer than anaerobic type athletes, likely gymnasts, sprinters, and weight-lifters. The width of RAM in the cadavers was narrower than athletes, and the width of RAM in athletes demonstrated a sport event-specific structure, which was that the width of upper, middle and lower parts of RAM was broader in aerobic type athletes, weight-lifters, and gymnasts, respectively. The characteristics of the pyramidalis muscle (PM) in both sex observed as irregular structure and no sexual difference was found in the length of PM. Type and number of the tendinous intersection (TI) were observed as three intersections of typeⅠ, four intersections of typeⅡ and two intersections of typeⅢ, but only few cases was revealed typeⅢ. A large proportion of aerobic type athletes was belong to typeⅡ, whereas typeⅠ was prevalent. The structural characteristics of TI can be divided as complete and symmetric or remnant and asymmetric types. Complete and symmetric type was mainly occurred in the first and second rows from xiphoid process on TI in both groups, but a large portion of asymmetric type was shown in the fourth row of TI. In case of fourth row of TI, complete type was appeared in anaerobic type athletes, but inversely remnant type was observed in aerobic type athletes and cadavers. Further, complete and symmetric type was prevalent in female in occasion of cadavers. No difference in the size of epigastric artery between sexes, but the right deep inferior epigastric artery was bigger than the left one. Number of the hilum of superior epigastric artery was highest in typeⅠ (inside of RAM) and followed in typeⅡ (middle of RAM). The type Ⅳ (two mouths type) and typeⅢ (outside of RAM) were only shown in male and female cadavers. The length of deep inferior epigastric artery was four centimeters and longer in male than female, and the right side was longer than the left one in both sexes.

DLC 박막의 열처리를 통해 합성한 나노 - 다이아몬드의 특성

이준석,정락희,조이갑,강동한,조혜민,오창권,권민철,김용,박홍준,이재열 한국진공학회 2004 한국진공학회 학술발표회초록집 Vol.- No.-

태권춤새(舞)의 음악에 관한 연구

안근아,정락희,장권,이재봉,문원재 한국스포츠리서치 2008 한국 스포츠 리서치 Vol.19 No.2

오늘날 태권춤새는 태권체조, 태권로빅, 태권댄스 등과 같이 명확한 구분없이 각종 대회에서 표현되는 동작구성과 배경음악에 따라 개명되고 있는 실정이다. 본 연구는 올바른 태권춤새 음악제작에 있어 우리음악의 당위성에 대해 논의해 보면 다음과 같다. 우리의 역사와 전통, 문화의 하나인 우리음악은 아름다운 소리의 율동과 춤으로 자신만의 독특한 세계를 전하고 있다. 이토록 위대한 문화유산을 보유하고 있음에도 불구하고 서양음악의 이해와 그 서양음악 속에서 요동치는 태권의 몸짓은 어불성설(語不成說)이라고 말 할 수 있다. 또한 태권도는 한국토착문화에서 형성된 우리 음악 위에 표현되어질 때 비로소 완전한 한국의 국기인 태권도의 몸짓 즉 태권도 정신의 예술적 표현인 태권춤새가 될 것이다. 또한 우리음악이 지니는 풍부한 정서는 한국인의 바람직한 인간상을 마련하기에 충분하다. 즉 태권춤새의 배경음악은 반드시 우리 고유 음악위에 만들어져야 한다. 이렇듯 태권도가 세계화 시대에 고유성을 지키고 과거 반세기만의 이룬 태권도 외교 입지를 성공적으로 굳히기 위해서는 태권춤새와 같은 연구와 그 배경으로 우리 음악의 이해와 토대위에 다시금 세워져야 할 것이다.