The relationship of the variables of the explosive power of the legs in terms of the Smart Jump device with the accuracy index of the diagonal crushing strike in volleyball

Improving the physical abilities of the game of volleyball may be the decisive factor in winning matches, especially when the skill level of the two teams is equal or close, as recognizing the fact of measurement using modern techniques whose results will be accurate and that help raise the level of players in terms of physical and skill, nor the researcher neglects the importance of other indirect or direct measurements, whose results may be close compared to modern devices. Through the researchers' follow-up of several researches, they noticed that the use of indirect measurements is prevalent at the present time, and most the accuracy index when performing the Cross Court smash hit in the research sample. The researchers recommend emphasizing the development of the explosive ability of the legs and arms to reach the player to the highest height to help the player direct the ball with high accuracy while performing the diagonal strike. And to emphasize that physical education colleges and departments have advanced measurement technology such as the Smart Jump device to evaluate the explosive ability of muscles and compare it to local athletes and compare it with the elite level in the year to know the strengths and weaknesses in the performance of our athletes.