Abstract
Volleyball is characterized by the activity of vertical jump performance in the technical elements of attack, block and service. The study focuses on young Female & Male players during the 12-week plyometric training. The objective of this study is to evaluate the effects of 12-weeks plyometric training performance in volleyball players M & F in Albania to see the differences between them. Methods; 40 young players (F & M) participated in this study. N=10 M & N=10 F volleyball players considered as Experimental and the same number as Control. The average age of players included in this study is 17-18 years old. The players of both groups were evaluated before and after 12 weeks. The F&M Experimental groups conducted 12 weeks of plyometric training with 2 sessions for a week. The F&M Control groups conducted the training according to the method of their trainers. Besides anthropometric measurements they developed Drop Jump tests by jumping from the cube in height 40 cm and 60 cm. Results; The results showed a high correlation coefficient (r = 0,924) and statistically significant (p <0,05). Data obtained from two groups GRFP show that the relationship between the contact time and the time air changes between the two tests DJ 40-60cm. Conclusions. The methodology used helps us compare the high and poor performances that help coaches to program more detailed plyometric training for the development of jumping skills in young volleyball players. The effect of plyometric training developed on M&F volleyball players and according to data obtained from GRFP, showed that male volleyball players had a better performance in vertical jump than female volleyball players. Vertical jumping may be assessed not only by the height of its development but also by the phase of residence in the air.
Highlights
Collective sports such as volleyball, football, etc., have different performances for their own characteristics of the game, so the training is specific where there are differences in the physical qualities of individuals and team performance
According to the data obtained from Ground Reaction Force Plate (GRFP) of F&M volleyball players, which we have presented in tab.3 and fig.1, show that the results of descriptive statistical analysis for the dependent variable "Time Air (TA) / Time Contact (TC)" showed that there is a progress in growth of the dance performance in this test in both groups after following the plyometric training plan
Compared to the reference table in "Reactive Force Index Limit for Drop Jump Test" we say the level of athletes taken in the Experiment despite their improvement in the TA / TC Index score represent a level of moderate reactive force ability volleyball players prepared for moderate intensity plyometric and reactive force as the goal of performance enhancement
Summary
Collective sports such as volleyball, football, etc., have different performances for their own characteristics of the game, so the training is specific where there are differences in the physical qualities of individuals and team performance. These sports have an important element in common "vertical jumping". Research has shown that the height of the vertical jump depended on the elastic energy accumulated by the skeletal muscles through the force of the muscle-tendon bond influencing the onset of concentric movement in the occurrence of increased jump performance [Giovanni. Plyometric exercises use the stretch-shorten cycle to train the muscles to perform, and perform greater work in the shortest possible time [Holcomb William R. et al, 1996]. Realization of the lengtheningshortening cycle without rest time realizes the accumulation of elastic energy from the muscletendon connection by transmitting the generation by the muscle of a greater force [Holcomb
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