’88 OLYMPIC 柔道 금메달 유망선수의 個人 特技 技術의 力學的 分析 = Biomechanical Analysis of Individual Favorite Techniques of Gold Medal In Promising Judoists ’88Seoul Olympic Judo Competition
저자
張銀景 (大韓柔道學校 助敎授·柔道學 專攻)
발행기관
학술지명
권호사항
발행연도
1988
작성언어
Korean
KDC
698.000
자료형태
학술저널
수록면
213-261(49쪽)
제공처
The purpose of this study is to analyze individual favorite techniques(Tokuinage) of Korean Judoists with the hope of '88 Seoul Olympic gold medal with reference to biomechanics.Subjects was 2 judoists and their Tokuinage were left seoinage and right osotogari.
In Tokuinage, the throwing form was filmed with 16mm high speed camera (100F/sec front & side view) and the reaction force was measured by force platform system.
After that, the Tokuinages were analyzed on the kinematic and kinetic aspects, respectively.
The results were as follows :
1.The time elapsed for individual Tokuinage, which showed KIM is 1.68 sec, HA is 2.09 sec (P>0.05).
2.Individual characteristics of the Tokuinage: KIM (left seoinage)-when right-foot toe, foot ankle and knee joint were in the last phase of kuzushi(breaking opponent's balance), the initial phase of Tsukuri (preparation before throwing the opponent), and uke (defender) touched the mat the records of velocity, acceleration, force, energy, work and momentum were higher than other phase.
HA (right osotogari) -When left-foot toe, knee joint and left-knee joint were between in the last phase of kuzushi and the initial phase of Tsukuri, the middle phase of Tsukuri, the last phase of Tsukuri, between in the Tsukuri and the initial phase of kike, and uke touched the mat, the records were higher than any other phase.
3.Motion analysis of kake phase:
The time elapsed from the beginning to the phase of kike-KIM showed 1.22 sec, HA wits 1.33 sec.
The time elapsed from the phase of kake (1) to the phase of kake showed 0.14sec Kim and HA.(P>0.05).when KIM exhibited left seoinage-the foot ankle angle (∠A) of attacking foot 70˚, in the phase of kake (1) 87˚.The knee angle (∠K) of attacking foot took 970 in the phase of lake (1) 120˚ the difference in foot-ankle angle and knee angle of individual was not significant (P>0.05).
In the case of HA's exhibition of right osotogari-the foot-ankle was 120˚ in the position of attacking foot and the knee angle 154˚.Drection of supporting foot in the phase of kake did not become the direction of frontal view and inclined to left side (85˚).
Even the sweeping foot of attacking foot mechanically was not efficient by exhibiting the dorsal flexion instead of plantar flexion.
4.Mat reaction force analysis in the phase of kale by force platform.:
The supporting time on the platform of F.P.showed 1.15 sec (KIM), 0.92 sec (HA)
M.R.F.of vertical direction (Fz) showed that each Judoist was different form one another and excellent in the phase of the following motions and it can be considered to be each individual's characteristics.
KIM - the kake phase
HA - the last phase of Air phase.
M.R.F.of anterior and posterior displayed direction (Fy) the following characteristics.
KIM and HA - the middle phase of Air phase.
M.R.F.of left and right direction (Fx)- KIM and HA showed the excellent phase of motion in left.
5.Maximum mat reaction force (M.M.R.F.) :
M.M.R.F.of Z direction was 860N, 1057N(KIM), 1648N(HA).The standard value divided by body weight showed 1.31B.W.(KIM), 1.89B.W.(HA)
M.M.R.F.of X direction was 373.5N, 172.8N(KIM), 424.7N(HA) and the divided standard value was 0.57B.W., 0.26B.W.(KIM), 0.44B.W.(HA).
M.M.R.F.of Y direction was -95N, 230.3N(KIM), -747.5N(HA) and the divided standard value was 0.14B.W., 0.35B.W.(KIM), 0.78B.W.(HA).
6.Impulse :
The impulse of Z direction was 495.4N-sec, 670.3N- sec(KIM), 586.6N -sec(HA) and the divided standard value was 0.86B.W.sec, 1.16B.W.sec(KIM), 0.70B.W.sec(HA).The impulse of Y direction was 129.7N-sec, 10N - sec(KIM), 148.4N-see(HA) and the divided standard value was 0.23B.W.sec, 0.02B.W.sec (KIM), 0.18B.W.sec (HA).
The impulse of X direction was -34.2N-sec, 89.4N-sec(KIM), -75.1N-sec (HA) and the divided standard value was 0.06B.W.sec, 0.16B.W.sec, 0.09 B.W.see (HA).
7.Center of pressure :
On the Attack side-The Y direction of Y axis was 9.95cm(KIM).The X direction of X axis showed 8.82cm(KIM).
On the opposition of attacking side-The Y direction of Y axis was that HA's motion was wider(17.47cm) than KIM(17.47cm).
The X direction of X axis was that HA'S motion was more wide(14.47cm) than KIM (8.82cm).
Finally, as individual characteristics vary the value of kienmatics were different from on another.
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