الخصائص البيوميكانيكية لقدمي الارتكاز لحظة الدورة الثالثة و الرابعة و علاقتها بالمسار الزمني و الهندسي لإطاحة المطرقة

الملخص EN

The research aims to study the biomechanical properties of the feet of the fulcrum moment of the third and fourth round and their relationship to the time and engineering path to throw the hammer, the researcher used the descriptive approach to suit the nature of the research and its procedures, the sample was selected the search method and their number the number of 2 players from Egypt, the disposal angle reached 41 c and this angle is close to the optimal, while the disposal speed reached 25 meters / second, the height of the center of gravity of the body reached the moment of disposal (1,14) meters and this height confirms the high physical ability of the players sample research, focusing on reducing the times of individual and even fulcrum without deviation of the body on the geometric track during the individual or even fulcrum in the four rounds in the hammer.