Comparative analytical study of Some Biomechanical Variables of the Wall barrier of Stability and Motion in Volleyball

Abstract

The goal of the research is to identify the following: 1-Evaluate some of the biomechanical variables of the wall barrier skill of stability and motion in volleyball. 2-Differences in some biomechanical variables between the barrier wall skill of stability and motion in volleyball. The researcher hypothesized that there are differences of statistical significance in the values ​​of some biomechanical variables between the barrier wall skill of stability and motion in volleyball. The researcher used the descriptive approach in the method of analysis and comparison to the relevance of the nature of the research. The researcher conducted the final field experiment on a sample of (5) advanced players representing the team of the University of Mosul volleyball، and were chosen in a deliberate way. The researcher used the technical scientific observation، the questionnaire، the measurement، the analysis and the test، as a means of collecting data to obtain the research variables under study. The researcher also used the following programs in the analysis: 1 - MAX TRAQ 2 - ACD See Statistical methods: arithmetic mean، standard deviation، T test of associated samples. The researcher reached the following: 1-There are significant differences in the variable velocity of the corner of the body from the maximum flexion until the moment left the ground between the barrier wall of stability and motion and in favor of the barrier wall of the resistance of the motion. 2-There are significant differences in the variable motor kinetic motion of Mtcj maximum of flexion until reaching the highest rise between the wall of the resistance of stability and motion and in favor of the wall of the resistance of the motion. 3-There are significant differences in the variables (total time، displacement and vertical speed of Mtkj، angular velocity of the knee joint، angular velocity of the trunk، vertical momentum، corner velocity of the hip joint in favor of the wall of the motion. The researcher recommended. 1- Emphasis on the main section of the motion, ie, the state of readiness and readiness and start to perform the wall of the correct form. 2 - Emphasis on the side step to prepare for the advancement because of the role of large in the player to get a vertical shift and thus get a vertical speed to enable it to reach the highest altitude.