The peculiarities of the body's external structure and indicators of central hemodynamics of volleyball players of different positions

Abstract

The aim was to determine the main differences in the external structure of the body and the of central hemodynamics parameters in of high-level sports skills volleyball players of the juvenile age with the role of libero, hitters and setters. Materials and methods: 116 volleyball players of high level athletic skill of the youth age from 16 to 20 years old. The control group included 140 practically healthy girls who were not engaged in sports of the corresponding age. Anthropometric investigation was performed according to Bunak's V. V. and Martirosov's E. G. method, rheographic – according to the method of Ronkin M. A. and Ivanov L. B. The reliability of the difference between independent quantitative values was determined using Mann-Whitney U-test. Results: It was established that volleyball players have significantly higher total, longitudinal, circumferential dimensions of the body, width of distal epiphyses, transverse diameters of the chest and pelvis in comparison with girls, who are not involved in sport. According to the most parameters of the body external structure the hitters are predominate than setters and libero. In hitters and setters, most anthropo-somatotypological parameters are larger than in nonathletes. The stroke and minute volumes, the impact index, the volume velocity of the blood and the capacity of the left ventricle in volleyball players are significantly higher. Specific peripheral resistance is significantly lower than that of girls who are not involved in sports. Between the volleyball players of different positions in the value of the central hemodynamics parameters, there were no significant differences, except for the impact index, which is significantly higher in libero than in the hitters. Conclusions: The external structure of the body, anthropometric parameters and indicators of central hemodynamics depend of volleyball player's position and have some peculiarities.