تأثير تمرينات مقترحة وفق أسلوب التدريب الهرمي الصاعد باستخدام الأثقال لتطوير القوة الانفجارية للرجلين و دقة مهارة الضرب الساحق بالكرة الطائرة

The importance of the research lies in hierarchal training style using weights for developing legs explosive power and spiking in volleyball. The problem of the research was in the weakness in jumping power during spiking. The research aimed at designing special exercises using weights according to hierarchal style for developing legs explosive power and spiking accuracy as well as identifying the effect of these exercises on the development of legs explosive power and spiking accuracy. The researchers hypothesized statistical differences between experimental and controlling group in pre and posttests in favor of the experimental group and posttests. The researchers used the experimental method on (12) volleyball players from Al Bea club. The results showed positive effect of hierarchal on legs explosive power and spiking skill in volleyball.