دراسة تحليلية لبعض المتغيرات البايوميكانيكية لمهارة الأرسال المتموج من القفز في الكرة الطائرة

Abstract EN

The aim of the research is to identify the recognizing the values of some biomechanical variables for the skill of undulating transmission from jumping with an approximation run and from jumping with a stride for volleyball players, identifying the values of the contribution ratio of the momentum of some main parts of the body from the overall momentum of the body to the skill of undulating transmission from jumping with an approximation run for volleyball players, identifying the relationship between the shoulder angle at the moment of hitting the ball (and the starting angle and speed of the ball) for the skill of the undulating serve from jumping with a step approach, identifying the differences in the values of the vertical work done for the skill of the undulating serve from jumping with a jump and from jumping with a step for volleyball players, and the researchers assumed that there is a discrepancy between the ratio of the momentum of some major body parts to the total body momentum of the undulating serve skill of jumping for volleyball players.

there are significant differences in the vertical work done for the skill of the undulating serve from jumping with an approach run and from jumping with a step for volleyball players, and there is a significant correlation between the shoulder angle at the moment of hitting the ball (and the angle of the ball launch and its speed) for the skill of the undulating service from jumping with a step by step.

the researchers used the descriptive approach for its relevance to the nature of the research, and the research sample consisted of (6) players representing the team of the college of physical education and sports sciences in volleyball / university of Mosul.

technical scientific observation was used using a video camera at a speed of 220 images / sec, as well as the use of special programs for kinetic analysis to reach the research objectives.

the variables of the research were determined by analyzing similar studies and the literature on the skill of undulating transmission from jumping in volleyball, and the researchers concluded a number of conclusions from them, the absence of significant differences in the value of the vertical work variable performed between the skill of undulating transmission from jumping with an approach run and a step.

and the relationships that appeared were logical, as the shoulder angle is the one that determines the starting angle, which is related to the point of hitting the ball.

the researchers recommended some recommendations in the light of what was reached through the research results.