Time Air Changes of DJ 40-60 Plyometric Test for 12 Weeks Training in Young Volleyball Players in Albania

Enkeleida Lleshi,Dhimitraq Prifti

doi:10.5901/ajis.2015.v4n3p215

Abstract

The study focuses on young volleyball players in Albania during the 12-week plyometric training in order to compare and evaluate the residence time in the air during the vertical jump performance through DJ40-60 test. Methods. Twenty young (male) volleyball players considered as the experimental group No = 10 and control group No. = 10 (age 17 ± 1) are participating in this study. Both volleyball groups were evaluated before and after 12 weeks. Only the experimental group developed 12 week of plyometric training with 2 sessions per week.The control group developed technical and tactical training with the ball. Besides anthropometric measurements they developed drop jump tests by jumping from the cube in height 40 cm and 60 cm Resulsts.The results showed a high correlation coefficient (r = 0,924) and statistically significant (sig.

Highlights

A volleyball player during a game or a match alongside the technical elements - should develop tactical and technical elements such as; attack, block, service and/or following by vetrtical jumping
Several studies focused on drop jumps and possible plyometric training effects: (Pacheco, et al, 2011) concluding that static stretching has a significant effects on drop jumps 40 cm; (Tsolakis, et al 2010) concluding that static stretching does not have a statistically significant effect on the drop jump; (Behm & Kibele, 2007) concluding that static stretching held for 30 s significantly decreases drop jump height; (Fletcher 2013) concluding that the height of the drop jump significantly increases after a warm- up including resistance training and dynamic stretching; have been reviewed
We have conducted a study with young volleyball players during the 12 week training in order to assess and compare the ability of jump performance in the phase of the time of contact and the time of flight through Drop Jump

Summary

Introduction

A volleyball player during a game or a match alongside the technical elements - should develop tactical and technical elements such as; attack, block, service and/or following by vetrtical jumping. To assess the vertical jump is needed the application of Bosco tests such as Drop Jump (Gilles & Dominique, 2009) that made possible the definition of the height of the optimum fall from which the volleyball player takes\wins the maximum jumping and the connection between the height of the fall, the time of contact and flight-time. Some authors have reported (Voelzke, et al, 2012) that a commanded plyometric training shows that exercises are effective to increase the jumping, speed and skill of volleyball players. The purpose of the study was to determine if twelve weeks of plyometric training can improve a volleyball player's jumping skill. We have conducted a study with young volleyball players during the 12 week training in order to assess and compare the ability of jump performance in the phase of the time of contact and the time of flight through Drop Jump

Objectives

Methods

Results

Conclusion