EXERCISE PHYSIOLOGYAND BIOMECHANICS
3
ORIGINAL ARTICLE
Biomechanical analysis of legs position in the execution of the throwing technique in judo sport- SASAE TSURIKOMI ASHI FADIL REXHEPI 1 1
Faculty of Physical Education, State University of Tetova, FYROM
Correspondence: F. Rexhepi, Faculty of Physical Education, State University of Tetova, FYROM, E-mail; fadil_rexhepi@yahoo.com Abstract The biomechanical analysis of the throwing techniques in the sport of judo is one of the most effective ways to determine more accurate data. The purpose of this study has been the determination of key indicators on the athlete’s body position (the thrower - tori) during the execution of the leg throwing technique, sasae tsurikomi ashi. Hence, 11 judoka were included for this purpose where one of them executed the technique on ten others (the thrown - uke). The analyzed technique, sasae tsurikomi ashi, was realized by engaging the active leg and blocking the opponent’s leg. In biomechanical terms, torque is applied on the opponent’s body. Higher values of displacement of the thrower’s supporting leg, thrower’s blocking leg, the displacement of the center of gravity and the trajectory of his movement, are displayed in the anteroposterior direction. Significant lower values are displayed in the vertical direction, while the displacements are much lower in the mediolateral direction. Furthermore, during the analysis it is proved the importance of the blocking leg velocity in the forward direction and the importance of the opponent’s traction in the backward direction of the thrower’s body. Keywords: judo throws, sasae tsurikomi ashi, biomechanical analysis, displacement, trajectory. Introduction The sport of judo is seen as one of the most attractive sports, with high educative and recreation values. The throwing techniques as well as other techniques enable to subdue the opponent and achieve victory. The group of leg throwing techniques is very effective for achieving scores, but on the other hand they are difficult to execute. These techniques are difficult because the position of the thrower (the thrower in judo is called - tori) during the execution phase of the leg techniques takes specific position where he has to stand supported with one leg (the supporting leg), while with the other leg (the active leg) acts on the opponent’s body (the thrown in judo is called - uke). This can be in the form of reaping one or both opponent’s legs, namely in the form of blocking, sweeping, etc. It is particularly important that the coach knows the most convenient positions of the thrower (tori) and
the thrown (uke) bodies during the training process. In biomechanical terms, the sasae tsurikomi ashi technique is executed by blocking the opponent’s leg, while with both hands pulling forward the opponent’s body, which means that we act on the basis of biomechanical principle of “torque” on the opponent’s body (Sacripanti, 1989). Regarding tori’s body position in respect to uke, the sasae tsurikomi ashi technique belongs to the group of techniques called “direct techniques”, because tori does not turn his back towards the opponent during the execution of the technique. Actually, he is facing uke with his chest and head during the whole time of the attack. The high level of competition in the sport of judo has made the need for detailed analysis of the techniques of this sport a necessary action. Such an action is impossible by simply