تقييم فاعلية كمية الحركة الزاوية لمرجحة الذراعين و مساهمتها برفع مركز الكتلة عند أداء حائط الصد من الثبات بالكرة الطائرة

الملخص EN

The importance of the research is that biomechanics helps in obtaining information on the details of the analysis of the technical performance and the data are sequential and synchronized, and therefore the analytical studies contribute to the evaluation of the technical aspects and factors affecting the internal and external body in providing information on the amount of angular movement of the weighting of the arms that contribute to the height of the center of mass Body and perform the primary duty of blocking wall skill The research objectives were : Evaluating the effectiveness of the angular momentum of the arms and its contribution to raising the center of body mass of the blocking players from stability in volleyball 2- Identifying the values of some biomechanical variables that contribute to the amount of angular movement of the arms in the players of the blocking : The most important conclusions : It was found that the contribution of the angular momentum to the swing of the arms by raising the center of body mass when performing the skill of the blocking from the stability of the volleyball was not a significant contribution.

2- And that the research sample did not benefit from the correct performance of the weighted, which saves them the effort as required, i.e.

there was no effort economy.

Main Recommendations : Emphasis on the angular movement of the arms in coordination with the rest of the body.

Emphasis on angular velocity exercises for the arms according to training stresses to achieve a good angle movement quantity.

Keywords : Evaluation Motion Amount-Blocking wall–Volleyball .