The Effect of Exercises Using The Vertimax Device on Developing Special Strength and The Skill of Hitting The Back Smash in Volleyball for Juniors.

The effect of exercises using the Vertimax device on developing special strength and the skill of hitting the back smash in volleyball for juniors Researchers: Prof. Dr. Nabil Kazem Haribd M.M. Haider Qasim M. M. Dargham Abdel Azim. 
The modern volleyball game is characterized by speed and strong performance throughout the match, and this requires players to possess a high level of special strength that qualifies them to continue positive performance until the end of the match and achieve victory. Through the experience of the researchers, as they are former players and coaches of this game, and its current presence in the scientific and practical field, and their continuous follow-up of Al-Qasim Sports Club in volleyball, they noticed a weakness in the back smash, in addition to the great development of the blocking wall. Which made it difficult to perform a close front smash, and this gave importance to the back smash as it is performed from the back area. Therefore, the player needs a high level of special strength in the arms and legs in order to succeed in the back smash skill, so the researchers decided to develop specific exercises using the Vertimax device. To develop the special strength of the arms and legs and the skill of backhand smashing for junior volleyball players. The research aims to:
1- Preparing exercises using the Vertimax device to develop special strength and the skill of hitting the back smash in volleyball for juniors.
2- Knowing the effect of exercises using the Vertimax device to develop special strength and the skill of hitting the back smash in volleyball for juniors. The most important conclusions were
1- The specific exercises used on the Vertimax device have a positive effect on the development of the explosive strength of the legs and arms and the skill of backhand smashing for junior volleyball players.
 2- The method followed by the coach has a positive impact on the development of the explosive power of the legs and arms and the skill of backhand smashing for junior volleyball players.