The effect of rebound strength training on the values of some biomechanical variables of the skill of backward crushing volleyball for youth

الملخص

The skill of hitting the back crush is one of the offensive skills that have an effective and clear role in resolving the points of play, so workers in this field resort to raising the level of efficiency of the players in their performance and thus raising the level of technical performance of the team through the diversity of offensive skill performance by overwhelming beating from different playing areas, which facilitates the process of deceiving the opposing team's defenses from the field, and thus points can be obtained easily, and in order to achieve the above, it is necessary to use exercises commensurate with the development of Different weaknesses of the players, so the researcher resorted to the use of rebound strength exercises on some parts of the body.

The researcher noted that the rebound strength training did not take the required applied space within the coaches' curricula for the skill of beating the back crush and there is a lack of clarity in the possibility of achieving and developing physical capabilities associated with all mechanical conditions, as the study aimed to identify the impact of rebound force training in developing the values of some biomechanical variables of the skill of beating the back crushing volleyball for the research group.

The researcher assumes in this research that there are statistically significant differences between the pre- and post-measurements in the values of some biomechanical variables of the skill  of beating the back  crush volleyball for the research sample.

As for the research methodology, the researcher used the experimental approach with one experimental group to suit the nature of the research, either the research sample was chosen by the researcher in the deliberate method, as it consisted of (10) players from Al-Shatra Volleyball Club, the youth category, either the most important conclusions were that all the exercises that were used to develop muscular strength and biomechanical and anatomical foundations, whether for the muscles of the legs, trunk or arms, increased the efficiency of internal strength, and thus reflected positively on the biomechanical variables of the skill of  beating the back crush.The researcher recommended emphasizing the conduct of rebound strength exercises in the manner of interval training and the use of various auxiliary devices and tools, especially for the muscles working in the lower limbs, the muscles of the center and arms, for their importance in achieving integration between the physical and biomechanical side of the skill of beating the back crushing volleyball.