العلاقة بين بعض المؤشرات الكينماتيكية و المستويات الرقمية المختلفة لمسابقة رمي الرمح

Abstract EN

Notable variance in the achieved different levels was determined during the (2015) Republic’s Cup competition, as the difference of distant was (11.74 m) between the first placed player (78.50 m) and the second placed player (67.06 m), while the difference was (21.36 m) between the first placed player and the last placed player (the sixth) (57.44 m), although the first placed player was far of his own personal number with more than (10) meters.

This was the main reason that the researchers divided the (20 m) range into four different levels to determine the distinctive kinematic indices for each level, and to identify the most effective variables on the increase of the digital level between the four levels by conducting the kinetic analysis, which contributes to provide the necessary information for the Egyptian coach which is reliable in constructing the training programs to work on improving these kinematic indices to upgrade the local level of this competition.

The researchers used the descriptive approach based on the kinetic analysis.

Conclusions: 1- The indices with the highest contribution in the achieved distance were (the height of the starting point, the average velocity of the javelin before departure).

2- The possibility of differentiation between the four levels under study is through six basic variables which are in order (the horizontal velocity of the javelin at the moment of departure, the angle of the right knee in the throwing position, the angle of departure, the angle of the left knee at the moment of departure, the time of affecting the javelin, and the angle of the right elbow in the throwing position).

3- There was a positive relationship between the variables of (the horizontal velocity of the javelin at the moment of departure, velocity of the javelin at the moment of departure, the angle of the left leg knee at departure, the distance of affecting the javelin, the time of affecting the javelin, and the height of the starting point) and the achieved distances at the different levels.

4- There is a negative relationship between the variables of (the angle of the right leg knee at the throwing position, and the average velocity of the javelin before departure) and the achieved distances at the different levels.

Recommendations: 1- The javelin thrower’s training program should include training loads at certain angles according to the requirements of the technical performance as well as plyometric training for the legs to increase the ability of braking at the throwing position.

2- It is necessary to improve the effect distance of the javelin while reducing its duration because of its significant impact on the variable of average velocity of the javelin before departure, which was a significant contributor in the achieved distance.

3- It is necessary to improve the thrower’s ability to control the corners of the joints of his body during performance according to the requirements of each stage for their significant impact in improving the achievement level.