Effectiveness Of Program (Educational - Training) To Develop Some Basic Skills For Volleyball Juniors The Biomechanics Efficiency of Facing by Turn Round Smash as the Training Basics for Volleyball Player Designing a scale of psychological skills for volleyball referees The endurance of muscular ability and their impact on the accuracy of the performance of the hit attack and blocking for volleyball players The relationship of psychological combustion with the various degrees of volleyball referees The effect of developing physical characteristics contributing to the skill of attack hitting from back area In volleyball A comparative study of psychological rigidity among the various degrees of volleyball referees The effectiveness of using job training on some physical and skill abilities For volleyball players The effect of a training program in the direction of the anaerobic threshold as an indicator to improve muscle ability and some physiological abilities of rapid attack and blocking for volleyball players The effect of a training program on the level of some physical and harmonic abilitiesAnd the skill for volleyball beginners