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European Journal of Physical Education and Sport Science ISSN: 2501 - 1235 ISSN-L: 2501 - 1235 Available on-line at: www.oapub.org/edu Volume 3 │Issue 11 │2017 doi: 10.5281/zenodo.1146767 A PROPOSED SET OF CORRECTIVE EXERCISES ACCORDING TO SOME KINEMATICS VARIABLES AND THEIR EFFECT ON THE ACCURACY OF THE PERFORMANCE OF THE FIELD DEFENSE SKILL IN VOLLEYBALL Bouhadj Mezianei, Lebboukh Toufik Institute of Sciences and Techniques of Physicals and Sports Activities, Bouira University, Algeria Abstract: The study aims to identify the values of Certain kinematics variables to field defends skill in volleyball with players of the clubs of section II 'nobles' and the discovery of mechanical errors that have an impact on the skill performance when volleyball players’ accuracy, identify the percentage contribution of some kinematics variables in result skill performance, indicate that the kinematics variables significant impact on the development of corrective exercises own skill, and finally to show the effectiveness of the exercise corrective built according kinematics variables extracted from videos analysis of performance of the players and proposed to correct skill performance of the players in clubs of section II ''nobles''. In order to further study, we used the experimental method on a sample deliberate volleyball clubs activist in the second national department (regional center) volleyball, and was the 30 players, a control group of 15 Players and an experimental group of 15 club players (NAHD), (NRBH), (ASJK). Using the field observation, videography, Anthropometric measurements, field defends skill testing, kinematic analysis of videos. The researchers found that corrective exercises programmed her highly effective in developing and improving skill performance of the players of clubs in section II ''nobles'', kinematics analysis helps to detect and determine the kinetic errors in performance, kinematics analysis helps build corrective exercises necessary to amend the players mistakes. From all this, the researchers concluded that kinematics variables and because of its importance is an important factor that should be resorted to Copyright © The Author(s). All Rights Reserved. © 2015 – 2017 Open Access Publishing Group 377 Bouhadj Meziane, Lebboukh Toufik A PROPOSED SET OF CORRECTIVE EXERCISES ACCORDING TO SOME KINEMATICS VARIABLES AND THEIR EFFECT ON THE ACCURACY OF THE PERFORMANCE OF THE FIELD DEFENSE SKILL IN VOLLEYBALL in order to develop and improve the performance of the players in the field defends skill in volleyball. Therefore, the researchers suggest the need to be a coach familiar with the principles of bio-mechanics and familiar techniques of analysis and variables kinematics skill, help of the principles of bio-mechanics and the results of the kinematic analysis to propose practical exercises and corrective exercises for skills errors. Keywords: exercises, kinematics variables, performance accuracy, field defends skill, volleyball 1. Introduction Biomechanics in its modern concept is a self-contained science with its own rules and applied rules. It is widely used in the mathematical field and the study of various mathematical movements. This science has an effective and fundamental role in the recorded progress of motor performance in general and sports in particular, The causes of movement and attention to study all the forces leading to it provides the most appropriate solutions kinetic motor analysis used based on mechanical variables, which includes assumptions and preliminary introductions with a modern scientific relationship to guide the athlete in various sports activities. Most scientific studies have emphasized the importance of kinetic analysis "which depends on discovering the strengths and weaknesses and trying to find the reasons as well as finding the negative and positive variables that affect the movement in the light of the associated physical capabilities or anthropometric specifications taking into account the goal to be achieved by the movement" . (Musallat, 1999, p. 44) Among the games dealt with by biomechanics is the analysis of volleyball. This is because it is one of the games that have developed a lot because of the interest of the countries, as well as the link to many of the sciences that eventually led to the arrival of the game to the upper levels. Several studies and literature dealt with the subject of kinematics analysis And its relation to the dynamic performance of the skills of volleyball players and ways to improve it and this considering the attractiveness of the game and the aesthetic performance of its players and the interest of States to develop and upgrade them. Field defends skill is one of the basic skills in volleyball. All team members must be proficient in their performance and in a very efficient manner. Otherwise, the player is a source of weakness for the team, so the team coaches always seek to select the players who have a high level of skill integration. And continue to European Journal of Physical Education and Sport Science - Volume 3 │ Issue 11 │ 2017 378 Bouhadj Meziane, Lebboukh Toufik A PROPOSED SET OF CORRECTIVE EXERCISES ACCORDING TO SOME KINEMATICS VARIABLES AND THEIR EFFECT ON THE ACCURACY OF THE PERFORMANCE OF THE FIELD DEFENSE SKILL IN VOLLEYBALL refine this skill to the ideal level in the technique by the high definition of kinematics variables affecting the performance. Each movement of defensive movements in volleyball has a mechanical position to play because this game is like other sports that need to analyze movements or special skills. In addition to the fact that they contain important movements through which to score as many points as possible and get the best results in matches. We cannot get good results and better and better levels without knowing the factors and biochemical variables (under study) that belong to this game, especially as this defense skill (field defends) through which to retrieve balls from the opponent and score points that qualify the team to win the game. In this study, we tried to know all aspects of kinematic analysis and accuracy of the performance of the defense of the stadium and the kinematics variables affecting it, and this by using corrective exercises based on these kinematics changes to help develop the accuracy of performance based on improved values of kinematics changes. For viewing / downloading the full article, please access the following link: https://oapub.org/edu/index.php/ejep/article/view/1370 European Journal of Physical Education and Sport Science - Volume 3 │ Issue 11 │ 2017 379