دراسة تحليلية لحركة القدمين (خطوات الاقتراب)‎ لمهارة حائط الصد على ضوء المتغيرات البيوكينماتيكية و من مختلف المراكز القريبة للشبكة في الكرة الطائرة

الملخص EN

The importance of the research lies in the fact that there is a weakness in the movement of the feet of the Iraqi national team in volleyball when performing the blocking wall skill such as (speed and type of approaching steps), the research problem is the slow of the movement of the feet(approaching steps), which is not commensurate with what we observe and see in The regional and global level, the study aimed to identify the relationship between the type of approaching steps and their speed for players when performing the blocking skill according of biokinamatech variables and from various centers close to the net, the researcher used the descriptive method in a way of mutual relations, the sample are the players of the Iraqi national team in the volleyball of the season 2017-2018, the research dealt with how to visualize, kinetic analysis and statistical treatments to get the results of the research and then discussing them to reach the conclusions, the most important of which is an exaggerated bend in the knee joint angle in the preparatory stage for the center player 3, approach all players block more than necessary from the net In the preparatory stage while the moment of maximum bending before jumping, the highest speed for the approaching steps was for the 3rd player when moving to the left side, and The lowest speed in the approaching steps of the center player, and other conclusions.