تأثير ثبات الجذع على معدلات إنتاج القدرة لدي ناشئي الرمي

الملخص EN

This study aims to find a relationship between the stability of the core area and the level of production power of the players hand ball, basket ball, Soccer and Volley ball, and try to answer the question , which represents the researchers great importance for being oversee the physical preparation for these activities , is there a relationship between the stability and rigidity, and has proven a number of research the importance of the contribution of the stability of the lower part of the trunk Core stability and hardness in perfecting movements rights in general, other research indicated to increase the efficiency of the production of power and generate more power associated with the movement of limbs and control the movements and economy of effort as a result of the stability and the stability of the lower trunk and muscles surrounding the stability or stiffness pelvis to improve athletic performance of important topics which differed by a lot of scientists and researchers , and stressed that there was a significant relationship between the hardness of the basin , especially the muscles surrounding the hips and the effectiveness of performance in more than a few of the sports activities , as well as the core area and also the lumbar region there multiple relationships proven a large number of recent research clarifies the relationship between the stability or stiffness core and athletic performance in general , including the great relationship between the stability or stiffness muscles of the trunk as a whole and injury prevention exercises weightlifting and also a direct relationship between the bottom of the trunk , "core region " and the surrounding muscles and between mastery of technique greatly respects .

We have noted the researchers that a youth who oversees the training face great difficulty through the movements of the two men and the consequent guidance wrong for the ball and not achieve the goal of performance and have noted researcher particular, in the activities of tennis, squash and noted frequent failure of the players and the lack of precision strikes, front and rear , a stage that where a player in dire need of stability and rigidity basin , where they noticed the researchers having some sort of instability during the performance of the movements of the two men , which paves the way for the process of hitting the ball , whether generally Racquet front or back where resorting to the tendency to either one of the two sides foreword or backward to try to control the complete hit the ball which hinder the completion of this stage properly and therefore did not score more points and therefore has researchers to strengthen the training program your search with a number of sample consistency and stability exercises and balance various motor using modern instruments and tools for all parts of the body .

We assume that researchers can use exercises stability (hardness ) pelvic increase the level of production capacity among members of the sample (hand ball, basket ball, Soccer and Volley ball, and the presence of statistically significant differences between the players four activities in the variables of research and according to the nature of performance in the activity Specialist hand ball, basket ball, Soccer and Volley ball, Applied research on a sample of 16 of the players activities ( squash - tennis - Badminton – Speed ball ) under 18 years old , of which four players each activity clubs Zamalek and elzhoor club shooting club and October 6 aged training between 2-3 years and the technical level of the sample above average and most of the top eight at the level of the Republic, the sample was selected builds intentional Applied after medical examinations and make sure carry the sample of the kinds of exercises that apply to them .

The use of the experimental method because of its relevance to the nature of the research and its properties have been applied in the environment Egyptian clubs clubs Zamalek and elzhoor , shooting and October 6 due to the nature and characteristics of search terms oversees the researchers on the physical preparation for the whole sample was conducted measurement tribal from 8-12/8/2012 tests Search post-test was conducted in the period from 15-18/11/2012 three months after the of tribal measurement .

Were presented the results in (4) tables fed differences between measurements Tribal variables research and measurements posttest among members of the sample, as indicated in Table ( 2 ) of the terms of the differences in addition to rates of change between the averages of measurements pre and post in measurements under discussion among members of the sample as is shown in the table (3) also indicates a table ( 4) to the differences between the players four activities in the variables of different search and I make sure researchers through transactions and statistical analysis as a whole that the use of exercises stability of the pelvis and increase the level of hardness of the trunk and especially the lower zone of the trunk allows mainly increase the possibility of producing higher rates of power and in particular the ability of the arms and torso , where are consistent result with the result reached by both John, Smolija , James and Julie in 2007 , which concluded that improve the stability of the trunk and hardness increase the production of power and strength and delay the occurrence of fatigue Aharkiovi table Special terms of the differences between Almjmowoat four ( hand ball, basket ball, Soccer and Volley ball), which illustrates the differences and discrepancies between youth team sets four activities in the measurements of search , which results indicated the superiority of notable youth team tennis in tests of throwing the ball from the side and throw the ball from the left and right side of sitting on the sample as a whole , in addition to outweigh youth team tennis significantly in the test stand on the platform unstable man left compared to the rest of the sample followed by football players speed tennis players in these tests then players badminton and squash , where condolences researcher these differences to the nature of the performance kinetic compatible between these tests and the performance characteristics of the activity Specialist among the differences that have emerged also among the four groups associated tests stand on the platform of the man right in favor of tennis players and squash as well as to outweigh the players squash on all members of the sample in a test throw the ball forward from sitting so check the hypothesis II and expressed no noticeable differences of statistical significance between the members of the four groups in different search variables and the researcher recommended work on innovation and design tools and equipment and other exercises , and according to the nature of the activity.

Specialist use this kind of exercise for the Games tennis players in particular and the rest of the activities Sports in general because of the active role they play in strengthening exercises properties Athletic performance in general more research and scientific studies and references that deal with this kind of Exercises due to their rarity.