As a result of the great development in the game of volleyball, developed countries have developed modern skilful methods in confronting the opposing team because they are convinced that these skilful methods are no less important than physical fitness, which must be mastered to a large and high degree to make it easier for the player or team to know the tactical aspects, whether offensive or defensive. The importance of the study is the relationship of some kinematic variables to know the strengths and weaknesses in the technical performance of the preparation skill and the relationship of those variables to accuracy. As for the research problem, there is a weakness in the accuracy of the performance of some types of preparation skills, and the researcher attributes the reason for that weakness to the lack of application of the kinematic conditions that are related to the correct technical performance that the prepared player must follow, which negatively affects the accuracy of the performance of the prepared player in preparing the ball.

Objectives of the study are to identify the relationship between some biomechanical variables of skill preparation front and back (low) and accuracy in the game of volleyball, and the researcher assumed the existence of a significant correlation between some kinematic variables for the skill of preparation front and back (low) and accuracy in the game of volleyball, as well as the presence of significant differences in some kinematic variables between the preparation skill Front and back (low) in the game of volleyball. The researcher selected the research sample by the intentional method and included (5) players representing the Missan Oil Club, and the main experiment was conducted on the research sample on 3/6/2022 Hall (al-shahid Wissam Oreibi) for volleyball in the province Maysan, the researcher used two video cameras, and the results were analyzed by the computer after converting the experiment from the videotape to the computer and then to a floppy disk (CD), and the results were analyzed by the program (Kinovea). To obtain the values of the kinematic variables of the study, the researcher used a set of statistical laws to treat the values of the kinematic variables statistically, as the researcher used the statistical bag (SPSS). V22 and the torsion modulus (Pearson's) law to find the homogeneity of a sample. The researcher reached a set of results, the most important of which is the presence of significant differences in accuracy between skills preparation. The front and the back (The low). Either most important unless Conclusions They are, characterize the preparation skill anterior low The highest percentage of accuracy compared to the rest of the types, and the effect of some bio-kinematic variables on the accuracy of the preparation skill, and the presence of differences in some bio-kinematic variables between the types of preparation skill used in the study.

Recommended a set of recommendations, the most important of which is the need to emphasize increasing flexion in the joints of the body, especially the knee and hip joints, in the low preparation skill, and the team coaches should focus on training the prepared player on the front and back low preparation skill, due to the appearance of weakness in technical performance and accuracy.