The effect of muscle strength training according to static muscle contraction on the values ​​of some biomechanical variables of the smash serve skill in youth volleyball

Abstract

Abstract of the research

Static muscle work is one of the physical characteristics that must be developed for volleyball players, which is related to the athlete's ability and efficiency to produce isotonic muscle strength related to rapid performance, as muscle training based on the principles of static work is one of the modern training methods that is concerned with developing muscle strength at its maximum stretch, and this is due to the type of selected training and its design according to the fixed biokinematic characteristics in which performance is subject to a set of variables that determine the characteristics of this technical performance of the skill of the smash, and the research problem was manifested through the presence of positive advantages in achieving the greatest possible propulsion force if static muscle work training is used in the correct and effective manner according to the mechanical conditions of the skill, it will contribute to developing muscle strength at its maximum stretch and thus its impact on performance from a kinetic point of view, and the aim of the research is to identify the effect of static muscle work training on the values ​​of some biomechanical variables for the high smash in volleyball, and the researcher assumed the existence of statistically significant differences between the pre- and post-measurements between the values ​​of some biomechanical variables for the high smash with the ball  The plane for the research group, and the researcher used the experimental method, by designing the single experimental group to suit the nature of the research, as for the research sample, (6) young players from the Akd Sports Club were chosen in volleyball deliberately in order to implement the study and achieve its objectives, and the researcher concluded that all the exercises used to develop the static work, whether for the muscles of the legs, trunk or arms, increased the efficiency of the internal strength, the strength of the ligaments in producing the torque force, and the researcher recommended emphasizing the implementation of static work exercises, especially for the muscles working on the hip joints, knees and ankles, as well as the muscles working on the shoulder joints, elbows and wrists, according to what was applied in the research for its importance in achieving the speed of approach and launch and placing the center of mass of the body at the highest possible height due to the development of muscle strength during performance.