تأثير استخدام التدريبات النوعية لمرحلتي المرجحة الخلفية و التكور و الامتداد على بعض متغيرات الأداء المهاري لمتسابقات القفز بالزانة

الملخص EN

The ballistic vaulting competition is considered the most exciting, difficult and complex field competition, due to the multiplicity and overlapping of its technical stages, and the researcher noticed the severe shortcomings of many players in implementing some stages of technical performance, especially the back-weighted stage and the balling, and the extension stage due to not relying on the induction of bending in the polyp During the jump, which resulted in the failure to achieve suitable heights for the height of the fist used, which requires the need to intervene to modify the most important technical stages with an impact on the digital level, which prompted the researcher to try to use some specific exercises for these two stages to improve the level of skill performance.

Therefore, the research aims to identify the effect of using some specific exercises for the back-weighted and ball-bearing stage, and the extension stage on some variables of skill performance and the digital levels achieved for pole vaulting competitions.

The experimental method was used to suit the nature of the research, and the research sample was chosen by the deliberate method, which consisted of (4) contestants registered in the Egyptian Athletics Federation for the 2019 sports season, and the training program was implemented over a period of (12) weeks related to (5) training units per week.

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The most important results of the proposed training program were the improvement in speed levels at the end of the approach stage (the average velocity of the penultimate and final step), and the improvement of the skill requirements of the elevation stage (the distance of the rise, the distance between the grip and the forefoot, the moment of elevation, the angle of inclination of the trunk, the moment of implantation of the pole, the height of the center.

The weight of the body at the moment of rise, the angle of elevation (despite the increase in the velocity components (horizontal, vertical, and aggregate) of the center of gravity of the body at the moment of elevation, which increases the difficulty of implementing the requirements for skill performance, and improves the skill requirements of the back-weighted and ball-bearing stage, which aims to reach the pole at maximum flexion) The minimum distance between the center of gravity of the body and the point of the pole implantation, the minimum length of the pole, the time taken to reach the maximum curvature of the pole, the rotation of the body backward from the moment of the pole implantation), and the improvement of the skill requirements of the extension phase (increase in the time taken to extend the pole, approaching the center of gravity of the body at the moment of launch Al-Zana), which led to an improvement in the digital level by .)%13.33(