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본 연구는 양궁선수들의 숙련도에 따른 안정시와 슈팅시 신체 안정성과 슈팅기록간의 관계를 규명하고자 k체육고교에 재학중인 오른손잡이 여자 양궁선수 8명(숙련자 4명, 비숙련자 4명)을 대상으로 동적 균형 측정장치(Dynamic balance system)를 이용하여 측정하였고, 이들 결과를 안정시와 슈팅시 신체 안정성간의 관계와 슈팅시 신체 안정성과 기록과의 관계정도를 중다상관계수를 이용하여 분석하였다. 그 결과 다음과 같은 결론을 얻었다. 1. 안정시 균형중심의 x축요인은 슈팅시 균형중심의 x축요인과 R=.833 정적 상관관계를 보였다. 2. 안정시 균형중심의 y축요인은 슈팅시 균형중심의 y축요인과 R=.881, Left · Toe요인과 R=.738, Right · Toe요인과 R=.905의 정적 상관관계를, Left · Heel요인과 R=-.905의 부적 상관관계를 보였다. 3. 안정시 Left · Toe요인은 슈팅시 균형중심의 y축 요인과 R=.905, Left · Toe요인과 R=.810, Left · Toe요인과 R=.881의 정적 상관관계를 보였고, Left · Heel요인과 R=-.952의 부적 상관관계을 보였다. 4. 안정시 Left · Heel요인은 슈팅시 균형중심의 x축 요인과 R=.905, 흔들림 지수와 R=.881, Left · Heel요인과 R=.952의 정적 상관관계를, 균형중심의 y축 요인과 R=-.976, Left · Toe요인과 R=-.833, Left · Toe요인과 R=.-952, 전후 흔들림 요인과 R=-.929의 부적 상관관계를 보였다. 5. 안정시 Left · Toe요인은 슈팅시 Left · Toe요인과 R=.738, Right · Toe요인과 R=.905, 전후 흔들림 요인과 R=.976의 정적 상관관계를, Left · Heel요인과는 R=-.905의 부적 상관관계를 보였다. 6. 슈팅시 신체 안정성 요인과 기록과의 상관관계를 살펴보면, 균형중심의 x축요인 이 R=.651, Left · Toe요인이 R=.733, Right · Toe요인이 R=.675로 슈팅기록과 정적 상관관계를 보였다. 이상의 결론을 통해서 양궁선수들의 안정시 양발의 신체 압력 분포 요인이 슈팅시 신체의 흔들림요인에 상당한 영향을 미치는 것으로 나타났으며, 슈팅시 신체 안정성 요인 중에서 균형중심의 x축요인과 양발의 Toe압력 분포 요인이 기록에 영향을 미치는 것으로 나타났다. 따라서 신체 안정성을 높이기 위해서는 양발의 체중부하를 균등하게 주어지게 하고 양발 Toe에 신체의 압력 분포를 놓여 신체 안정성을 높일 수 있는 연습방법이나, 신발의 앞궆의 높이를 통해 Toe압력 분포가 정확하게 맞춰질 수 있는 양궁화의 개발도 필요하리라 생각된다. This study was conducted to prove the correlation of the physical stability and the performance according to the archer´s skill level in non-shooting and shooting. The subject were eight femail high school athletes(the skilled 4, the unskilled 4) and the motion was measured using Dynamic balance system. These data were analyzed to compute the multiple correlation of the physical stability and the record in non-shooting and shooting. The results were as follows. 1. The correlation of the X of the center of balance in non-shooting and shooting was R=.833. 2. The correlation of the Y of the center of balance in non-shooting and shooting was R-.881, and that of the Left · Toe was R=.738, and that the Right · Toe was R=.905, and that of the Left · Heel was R=-.905. 3. The correlation of the Left · Toe in non-shooting and Y of the center of balance R=.905, and that of the Left · Toe was R=.810, and that the Right · Toe was R=.881, and that of the Left · Heel was R=-.952. 4. The correlation of the Left · Heel in non-shooting and X of the center of balance in shooting was R=.905, and that of the sway index was R=.881, and that of the Left · Heel was R=.952, that and that the Right · Toe was R=-.952, and that of the ANT/POST sway distance was R=-.929. 5. The correlation of the Right · Toe in non-shooting and Left · Toe was R=.738, and that of the Right · Toe in shooting was R=.905, and that of the ANT/POST sway distance was R=.976, that and that of the Left · Toe was R=-.905. 6. The correlation of the X of the center of balance of the physical stability and record in shooting was R=.651, and that of the Left · Toe was R=.733, and that of the Right · Toe was R=.675 As the result of them, the physical pressure distribution factor of the archer´s feet in non-shooting affect largely physical swat distance and X of the center of balance and the pressure distribution of the both feet of the physical stability in shooting affect archery record. There, to evaluate the physical stability have to be balanced the both feet loading develope the training methods to evaluate the physical stability by evaluating the physical pressure distribution of the both feet and archery shoes to set exactly the toe pressure distribution by controlling the height of the front shoes.
본 연구는 중량을 들고 걷는 자세에서의 근육의 전위 활동을 분석하기 위해 P대학 체육학과 남 · 여 대학원생 중 오른손 사용자 5명에게 각각 5㎏, 10㎏, 15㎏, 20㎏, 25㎏의 중량물 운반시의 좌 · 우 상지의 각각 4개 부위에 대한 근육 전위 활동을 측정하여 비교 분석함으로써 성인 남 · 여에 있어서 적절한 중량들기의 한계치를 파악함은 물론, 중량들기로 인한 일상의 상해예방을 위한 기초자료를 제공하고자 하였다. 분석결과 5 · 10 · 15 · 20 · 25㎏의 중량물 운반시 상지근 대부분의 근육의 전위 활동은 여자가 남자보다 높게 나타났으며 중량이 무거워질수록 남자는 좌측 상완이두근과 상완요골근, 여자는 우측 상완이두근과 상완요골근이 주동근으로 사용되었고 여자에 비해 남자의 좌측 주동근의 근육 전위 활동이 높게 나타나 좌 · 우 평형유지에 힘든 요인으로 분석되었다. 또한 중량이 무거워질수록 여자 우측 요골근의 근육 전위 활동이 여자 상완요골근과 남자 좌 · 우측 상완요골근에 비해 높게 나타난 것은 몸 바깥쪽의 근 사용으로 효율적인 중량물 운반이 이루어지지 않음으로써 허리에 부담을 주거나 편중된 근 사용으로 인한 상해유발과 국소적인 근피로 가능성이 높은 것으로 나타났다. 중량들기 적정한계치는 남자는 25㎏, 여자는 15㎏으로 나타났다. This study is to investigate the most suitable models of load carriage and to provide fundamental data for preventing usual injuries. we selected five male graduates and five female graduates of P university, analyze their amplitude chages of electromyographic signals in front carring task, measure the limit value of load carriage by comparing each levels(5㎏, 10㎏, 15㎏, 20㎏, 25㎏) with action amplitudes of four parts of both arm muscle. In case of 5㎏ · 10㎏ · 15㎏ · 20㎏ · 25㎏ carriage, females have higher muscular conductivity value in most muscles of both arm than males. Males is used agonistic muscle left biceps brachii and musculi brachioradalis , also females is used agonistic muscle right biceps brachii and musculi brachioradalis. Males have higher muscluar conductivity value in left agonistic muscle than females according as load is heavier, it is shown to be to difficult the male to keep balance. The heavier load, the higher muscluar conductivity value of right musculi brachioradalis in females than musculi brachioradalis in females and musculi brachioradalis at both side in males. The result of as shown above, Since the way of load carriage is not effective caused by using the muscle at outside of the body. The localized muscle fatigue and injury would often occurred caused of taken overload at waist or using the specific muscle.
Bae, N-E. A Kinematical Analysis of Forward Handspring Motion. Korean Journal of Sport Biomechanics, Vol. 13, No. 2, pp. 89-100. In this research was to analyze 3-D kinematics variables for handspring of basic motion in the heavy gymnastics in order to investigate kinematical difference between expert and novice. Therefore, the purpose of this research was provide quantitative information, systematic provision, rules, establishment of basic skill for improving skill and teaching athletes. And in the research, results were as followings. 1. In the time variables, total time was that expert took 0.745sec and novice took 0.829sec. and as duration time of each event, expert was faster that novice in the air motion event except till second event of the preparation motion. 2. In the center of body variables. vertical direction variables, the displacement of body center hight was that expert showed 61.26% and novice showed 54.48% in the third event of air motion, also all event were showed expert was higher displacement than novice except first of event in preparatory stage. 3. In the angle displacement of main joint, the right direction was that expert showed 154.12degree and novice showed 174.85degree and the left direction was that expert showed 159.29degree and novice showed 171.46degree in the second event of main joint curved point at the same time hand was reached floor. In the angle displacement of knee joint in the third event of air motion. expert showed 155.25degree and novice showed 154.00degree in right, and expert showed 155.24degree and novice showed 154.55degree in left. In this result, both were same motion type. In the angle displacement of hip joint in the third event of the air motion, expert showed 142.80degree and novice showed 134.17degree in right. and expert showed 140.28degree and novice showed 144.94degree in left. In this result, motion pattern of expert was same both sides, but novice was different. According to the results, to increase efficiency of motion and aesthetic effect in the air motion, it should stretch displacement and height of body center and make similarly angle of right and left joint.
The purpose of this study was to determine the mechanical factors that govern success in the performance of handspring salto forward stretched with 1/1 turn. The subjects were two all-around gymnasts who registering sophomore in college. By means of three-dimensional film analysis, it was to analyze the sequence of duration phase, angle change of the body joint, and body of the center gravity during performance of handspring. The findings of this study were following as: 1. The sequence of duration phase indicated that Sub.1 has more stride than Sub.2 in the first interval and the shoulder joint has greatly extended, in which the linear movement at take off is transferred into the rotation movement with supporting on the ground. 2. In the several states, sub.1 has more flexor on the elbow of the left on the center of rotation, more twisted on the shoulder joint far from the axis of rotation than sub.2, in which resulted in constant twisting momentum. 3. Body center gravity showed to be low until supporting hands on the ground with taking steps. It was therefore to generate greatly the initial force of handspring based on the rotation of hands. In the fourth, upper extremities is bending forward and lower extremities is extending backward. These results were therefore of interest to determine the magnitude of flight in the air with support of greatly rotation. Of all the variables analyzed, the large stride, high rotation of vertical velocity based on axis of hands, and bending upper extremities forward, are important determinant for successful results.
K. C. LEE, S. J. BAE. Evaluation of performance characteristics in the success of team attack during women's volleyball competition. Korean Journal of Sport Biomechanics, Vol. 15, No. 1, pp. 148, 2005. The purpose of this study was to evaluate performance characteristics, in the success of team attack during volleyball competition. For this, real game was analyzed using S-VHS video camera for three dimensional cinematography. The contents of this research were receive to set time, set to spike time, setter moving distance, ball position during set and attacker's relative ball position during jump and spike, and open area at spike. Among the various kinematical factors considered in this study, the ball height relative spiker and open area were found to be related to offensive performance. This finding implies that although their direct impact were not significant the other factors could have indirect impact on offensive performance by increasing open area. Thus, receiver, setter, assistant attacker, and main attacker should practice for successful performance in each stage. Lastly, it is necessary to develop kinematic variables to evaluate performance characteristics of players. Further study may consider the best defense position against the attack of the opponent player.
D. K. LEE, J. S. LEE, B. J. LEE, H. S. LEE, Y. J. KIM, S. B. PARK, J. P. JOO. PIantar foot pressure analysis during golf swing motion using plantar foot pressure measurement system. Korean Journal of Sport Biomechanics, Vol. 15, No. 1, pp. 75-89, 2005. In this study, weight carrying pattern analysis and comparison method of four foot region were suggested. We used three types of club(driver, iron7, pitching wedge). This analysis method can compare between top class golfer and beginner. And the comparison data can be used to correct the swing pose of trainee. If motion analysis system, which can measure the swing speed and instantaneous acceleration at the point of hitting a ball, is combined with this plantar foot force analysis method, new design development of golf shoes to increase comfort and ball flight distance will be available. 1. Address acting, forces concentrated in rare foot regions and lateral foot of right foot. Back swing top acting, relatively high force occurred in medial forefoot region of left foot and forefoot region of right foot. Impact acting, high force value observed in the lateral rarefoot region of left foot and medial forefoot region of right foot. Finish acting, force concentration observed on the lateral region and rarefoot region of left foot. 2. Forces were increased in address of right foot with clubs length increased. All clubs, back swing top acting, high force value observed in the lateral forefoot region of right foot. All clubs, in impact, high force value observed in the lateral rarefoot region of left foot and medial forefoot region of right foot. Finish acting, force concentration observed on the rarefoot region in driver and lateral foot region in iron on left foot. 3. Right foot forces distribution were increased in address, back swing top and left foot force distribution were increased in impact, finnish
The purpose of this study was to perform a kinematic analysis of Harai-goshi(hip throw) in superior female judo players. From our analysis, it appeared desirable for the player to shorten the duration of the technique for maximum results. It was also desirable for the player to draw the opponent backward while simultaneously maneuvering her close to her own body. A turning movement of the body toward the left side was found to be required for the technique, during which the player must lower the position of the center of gravity. During the subsequent angular change of the elbow, the player winds the elbow and, by moving the left shoulder, pulls the opponent toward her. The player lowers the body center by bending the left knee and letting the right knee extend, while turning the upper body and bending the hip joint. The player then draws the opponent in, contacts the opponent closely, turns, and stretches the right knee and hip joint rapidly and concisely, completing the move; it was also found to be desirable for the angular velocity to be increased for maximum efficacy.
Purpose: The purpose of this study was to analyze the effects of using external kinesiotape wrapping for inner arch support on the lower extremity EMG for gait in stiletto heels. Methods: Subjects for this study were two female college students who had been wearing stiletto heels almost every day of the week for more than three years. The independent variable was the presence or absence of kinesio-tape wrap for inner arch support. Dependent variables were EMG readings for the four muscle groups: the medial and lateral gastrocnemius, the tibialis anterior, and the peroneus longus. EMG readings were taken using the NORAXON (USA). The Paired t-test within the subject repeated measure design for the presence and absence of inner arch support (p<0.05) was used via SPSS 18.0. Results: With kinesio-tape wrap for inner arch support, there was a statistically significant decrease in the muscle force mean values for the peroneus longus and the medial and lateral gastrocnemius, in the maximum muscle forces of the peroneus longus and the lateral gastrocnemius. Conclusion: External kinesio-tape wrapping for inner arch support in stiletto heels could have an effect to reduce peroneus longus, and medial/lateral gastrocnemius activities that could result in decreased fatigue and discomfort.
Objective: The purpose of this study was to investigate how different levels of compression exerted on the femoral region (known as the power zone) by coated fabric influences the activation and anaerobic capacity of the rectus femoris. Method: Three different levels of compression on the rectus femoris of the participants, namely 0% (normal condition), 9% (downsize), and 18% (downsize), were tested. The material of the fabric used in this study was nonfunctional polyurethane. Surface electromyography test was used to investigate the activation of the rectus femoris, while the isokinetic test (Cybex, 60°/sec) and Wingate test were used to investigate the maximum anaerobic power. Results: The different compression levels (0%, 9%, and 18%) did not improve the strength and anaerobic capacity of the knee extensor. However, knee flexor interfered with activation of the biceps femoris, which is an agonist for flexion, during 18% compression. Conclusion: Compression garments might improve the stretch shortening cycle effect at the time of eccentric contraction and during transition from eccentric to concentric contraction. Therefore, future studies are required to further investigate these findings.