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A1 اللامي، نوار عبد الله حسين. AB Importance of research show by focusing on speed, measured and their rates and reliance on the mechanical properties and are stride length and frequency as This research aims to identify the rate of evolution in the amount of speed to the players football school youth football after the preparation of special exercises for the frequency step style training slopes and applied to The sample after the use of the experimental method to design one group was applied this exercise frequency step using up the slope as it continued to be applied for ten weeks and then held a researcher test runs before and after and after processing the data researcher concluded that exercise used for the research sample was appropriate and contributed to the development rates of speed as that of the methods of training using various means Slope has an important role in the development of the level of physical capabilities and thus performance skills. (Published Abstract) http://search.shamaa.org/abstract_en.gif ID 125774 OP ص ص. 93-102 T1 أثر استخدام بعض التمرينات الخاصة لتردد الخطوة وفق بعض المتغيرات البايوميكانيكية (الزاوية - المسافة) لتطوير معدل السرعة للاعبي المدرسة الكروية، فئة الشباب لكرة القدم [مقال] UL 1 http://search.shamaa.org/fulltext.gif https://www.iasj.net/iasj/article/134127 النص الكامل (PDF)