This study aims to comparatively analyze lower extremity joint moment during the take-off phase in high jump and thus to provide the basic data for enhancement of highschool students' high jump skills. 2 highschool students - one males and one females - were chosen for the experiment in which the 3D image analyzer and ground reaction force measuring unit were adopted. The results are as follows: Similar to the changing patterns from lower extremity joint moment but, moment values it turned out that male were better than female. The flexion and extension moment of lower extremity were most significant, abduction and adduction, medial rotation and lateral rotation were relatively small. The moment value in sagittal plane, frontal plane, transverse plane were appeared larger in the order of hip joint-knee joint-ankle joint. The muscle activity of knee joint and hip joint were acts in conjunction with sequential knee joint-hip joint.

This study investigated factors affecting the behavior hurdles by six male high school student athletes and six average high school students using the ground reaction force and video analysis equipment. The conclusions by comparative analysis of kinematic and kinetic elements for stable operation of the high school men's hurdles to help effective guidance are as follows. 1. The analysis of Kinematics. First, required time of the athlete by all each section in the duration from ground of the stamping foot to stamping of landing foot appeared to be shorter than average students. Second, variation of height in variable distance from the center of the body changes the height of the cloud initiative is high ground and not out in the player. After that, the highest score of body-centered rather was recorded by general student. However, athlete showed higher score again in landing and stamping by landing foot. Third, athlete showed higher sway velocities in all section at variable speed. General students showed higher landing speed at the landing position. Fourth, athlete maintains the leaning forward upper body position at the stamping and landing situation. Especially in the highest score in body-centered, athlete showed over 20 degree than general students. Fifth, Athlete showed faster angular view than general student in all section. 2. The analysis of kinetic variable First, the athlete exerts rear position in the variation of before and after ground reaction force of stamping foot. In contrast, general student exerts front position. Second, Fx, Fy, Fz of the resultant change in the maximum measurement of R (max) values in the ground reaction force of stamping foot showed much stronger stamping food force in athletes than in the general student. Third, athlete and general student exerts outside and inside direction, respectively, at the variation of ground reaction force from landing and stamping position. Forth, athlete recorded higher than 1.5 time than general student at the variation of combined force of Fx, Fy, and Fz of ground reaction force of laning foot. In conclusion, the instruction of raising stamping foot to the forward direction to lean the upper body in the forward is needed for the general student to natural hurdle action. At that time, undisturbed balance at the center body must be maintained by both arms and flexibility training should be concurrent for forward dirction attention. General student should practice to roll shortly and strongly when they are stamping. In order to instruct the student proper posture through the hurdles classes, the exercises for basic strength and flexibility should be conducted simultaneously. Also, the instruction will be effective, if let the students practice the hurdle motion with understanding of principle of the body for jump.

The purpose of this research is to offer the teachers the useful resources that can be used while teaching the students the standing broad jump, using the equipment of the three-dimensional video analysis and of the ground reaction force to figure out the

The purpose of this study was to analyze of the upper extremities joint momet during handspring. The conclusion of this study were as follows First, Handspring touched on the hand when operating the landing, when the body becomes rigid, while the isometri

The purpose of this study is to compare 10 Badminton players with 10 common students on smash motions. These smash motions were analyzed by a three-dimensional image analysis and kinetic variables were calculated by using a ground reaction force system to

This study was to use the 3D visual device and surface reaction device for 6 male middle school gymnastics players and 6 plain students and analyze the factors to execute stable handspring and provide a guideline to teach male middle school students to ex

The purpose of this study was to analyze of the lower extremities joint moment during standing broad jump. The conclusion of this study were as follows. First, The muscle forces acting on foot-segment from ankle joint was plantar flexion, abduction, evers

This research is trying to figure out the factors that make effects on the body movement and batting speed of the 6 middle school baseball players and the 6 common students using the equipment of the video analysis and ground reaction force. By doing so,

The purpose of this study was to compare Men's high school tennis player's before-player serve and rear-player serve. Such serve movements were analyzed in three-dimensional image analysis, kinetic variables were calculated using force platform to underst

The objectives of this study were to make comparative kinematic and kinetic analysis on major motions in clean & jerk and snatch of weight lifting and to systematize the results for enhancing the athletic performance of male middle school students beginni

The purpose of this study was to find differences of sergeant jumping performances. The best(GP) & worst(BP) performance of each subject based on their jump height were compared in further analysis. There was a significant difference of approx. 18% in the

The purpose of this study is to offer the scientific data of male and female high school students' standing broad jump movements and to seek out effective instructive methods for this exercise through comparing and analyzing the variation aspects of the k

The aim of this study is to offer scientific materials and effective teaching methods of place kick motions of high school students by comparing and analyzing kinetic and motor mechanical variables of experts and beginners’ place kicks which are usually u

This study is conducted to examine kinematic and kinetic variables influencing on vertical jump records. To this end, as the subjects of the study, three male volleyball players and three general students vertically jumped five times, and the study compar

The purpose of this research to fing out the efficient guiding device during teaching based on the datum what were calculated kinematic and kinetic variable about the blocking in volleyball between expert and begginer in boy's middle school. six expert, s

The purpose of this study is to analyze the kinematic variables due to the course change in the first serve of high school girl tennis athletes using three dimensional video analysis and to produce kinetic variables using ground reaction force to understa

This study is aimed to develop and understandthe primary school students' current participation rate, contents and preference for the School Sports Club; as well as to aid in the development of the School Sports Club program by researching it academically

With the growth of scientific technology, the development of method and instrument has contributed to the study of Sports Biomechanics. It is considered that the paradigm of researching would be radically changed. Hence, the aim of this study is to analyz

The purpose of this study were to offer the scientific data of the right and left feet's kick motion of the ROK high school boy students and to seek out the effective method of instruction, througth comparing and analyzing the variation aspects of the kin

The purpose of this research to find out the efficient guiding device during teaching based on the datum what were calculated kinematic and kinetic variable about the vertical jump according to the distinction of sex in elementary school. Four male, five