The contribution percentage of some working muscles of the hitting arm, as indicated by the electromyography, to the straight spike accuracy index in volleyball.

Abstract

The research aims to identify:

1) the values of the electrical activity variables and the straight spike accuracy index for the players of the Peshmerga Club.

2) the relationship between the values of the electrical activity variables of the working muscles of the hitting arm and the straight spike accuracy index for the players of the Peshmerga Club.

3) the contribution ratio of the values of the electrical activity variables of the working muscles of the hitting arm to the straight spike accuracy index for the players of the Peshmerga Club. The research population was determined from the players of the Peshmerga Club in volleyball, who qualified in the Iraqi Elite League, totaling 17 players. Eight players were selected from the high position number 4 spikers using the method.The intentionality  This is to ensure that all players continue training and participate in trial matches in preparation for the Elite League for the 2015/2016 season. Since the nature of the research relies on their selection, their percentage was 47.06%. Additionally, three players were randomly selected by lottery as a sample for the exploratory experiment, while six players, including the libero, setter, and center players, were excluded. The researchers used the descriptive survey method with a correlational approach. For data collection, the researchers used an EMG device and a camera to measure the accuracy of the straight spike. The SPSS statistical package was used for data analysis, leading to the conclusion that...Several conclusions, including: the electromyography indicators of the studied striking arm muscles have varying relationships with the accuracy index of the research sample, the muscle activity indicators (peak, and time) of the biceps achieved a significant correlation with the accuracy index of the research sample, and the muscle activity indicator (time) of the triceps achieved a significant correlation with the accuracy index of the research sample.