دراسة تحليلية مقارنة لمتغير اقصى ارتفاع يصله مركز الكتلة في مسار الطيران و ارتفاعه لحظة أداء القسم الرئيسي من الحركة في مهارتي التصويب من القفز اماما وعاليا بكرة اليد و الضرب و الارسال الساحق بالكرة الطائرة

Abstract EN

The availability of important information that may not be identical to the ideas believed by practitioners of sport and these skills are what makes the athlete or the coach in a state of lack of awareness of what is happening during the skill performance and therefore does not include in the accounts the means that would change this performance for the better and that this information is available In terms of performance, it will allow the coach and athlete alike to search for ways and means that will develop the state and creativity and the problem appears in the form of a question, which is: Does the player perform the skill of hitting or crushing and the skill of shooting with the hands of both types of jumping high or in front when The body and the center of mass of the player are at their maximumheight and the study aimed to identify the differences in the values of the variable of the maximum height reached by the center of mass in the flight path and the moment of performing the main part of the movement in the two correction skills of jumping forward and high with handball, hitting and overwhelming volleyball.

The researcher assumed the existence of differences.

The descriptive approach was used in a comparative graduate studies method, and the research sample was from the players of the national handball and volleyball team.

The imaging was done with a sony machine with a speed of 100 fps and the analysis was done using the dartfish program, and the researcher concluded the following: - It appears that the player in the skill of shooting with handball by jumping forward or high leads to the correction at a point less than the maximum height of the center of the block, i.e.

after the beginning of the landing.

- The skills of spiking and spiking were found to be the performance of hitting the ball after the landing process began from the maximum height of the center of mass in the flight path I recommend some recommendations from them 1- Emphasizing that the performance of the main section is usually after the player has fallen from his maximum height, causing a drop in the correction point or hitting the ball, so attention must be paid to increasing the maximum height in proportion to the type of skill.

2- Preparing exercises that contribute to increasing the athlete's ability to quickly perform the correction or hit the ball so that the drop in the center of mass does not increase significantly, causing an inappropriate height to the starting point of the ball, especially for spiking and spiking serve.