An analytical Study of the most Important Biochemical Variables Affecting the Accuracy of High Jump Correction using the Random Handball Selective Device

Abstract

The field of biomechanics offers a lot of effort by analyzing the details of the movement and applying the mechanical basis for it to achieve maximum efficiency. The handball game is one of those games that researchers and specialists sought to explore in detail. They are characterized by strength, the speed of motor responses and speed of decision making because the competitor is very close Especially in the skill of correction, which is one of the most important skills through which the team can win the games.The importance of research is to limit the number of variables that are the important factor in accuracy in order to focus on them during the exercises, which is attributed to the players benefit and therefore reflected on the results of our sports teams pulley and limited the problem of research in the lack of information that definitively determine the most important biochemical changes that are the most The impact on accuracy, which distracts the work of the coach and the players alike, is a problem that requires study and development of solutions, especially if there is an important requirement is not to specify the area that will be corrected when the player is subjected to random variables. The aim of the study was to design a device to measure the accuracy of the correction of the hand wheel jump automatically and directly and to identify the most important biochemical changes that affect the accuracy of the correction of jumping high handball using a random selection device.The researchers used the descriptive approach. The sample of the research was the national team. A device was designed to achieve the goal of the research. The experiment was filmed with a video type Sony. The Dartfish program was shown and the results were processed statistically as:-1-it was found that the variable angular velocity of the arm obtained the highest impact rate in precision reached (34.80%) by jumping high in the handball.2-It turns out that the variable angle of the ball start got the effect ratio (9.90%) in the accuracy of the correction. 3-It turns out that the hip angle variable at the moment of correction obtained the ratio of (11.70%) effect in the accuracy of the correction.The researchers recommended a set of recommendations, the most important of which are:1-Emphasize the variables that have achieved a high impact rate in accuracy during the training modules as well as on building skills for new players.2-Provide training means during the training contribute to the focus on the development of these variables when the correction of jumping high hand roller.3-Familiarity in all mechanical basis to correct the wrong path of the players and their effect.