The effects of vibration frequency variation on volleyball players’ drop jump ability and postural control performance

Izzet KIRKAYA; Deniz SIMSEK; Hayri ERTAN

doi:10.15314/tjse.90488

The effects of vibration frequency variation on volleyball players’ drop jump ability and postural control performance

Authors : Izzet KIRKAYA, Deniz SIMSEK, Hayri ERTAN

Pages : 14-21

Doi:10.15314/tjse.90488

View : 65 | Download : 12

Publication Date : 2015-07-02

Article Type : Other Papers

Abstract :The aim of the performed study is to present the acute effect of the whole body vibration insert ignore into journalissuearticles values(WBV); stimuli on drop jump insert ignore into journalissuearticles values(DJ); and postural control performance. 13 athletes who play in Turkish Women Volleyball Second League voluntarily attended to the study insert ignore into journalissuearticles values(22.3±2.6 age; 60.72kg ±1.74kg; 1.79cm±6.4cm);. Athletes were randomly divided into three groups insert ignore into journalissuearticles values(group 1: n=4: 30Hz; group 2: n=5: 35; group 3: n=4: 40Hz);. Before fatigue protocol, every participant’s rest center of pressure- sway insert ignore into journalissuearticles values(CoP-sway); and DJ measurements on force plate were taken. Statistical whole body vibration measurements were practiced on Compex WINPLATE on different frequency insert ignore into journalissuearticles values(30-35-40Hz);, on high amplitude, in the manner that knee flexion angle is 120 0 in 60 seconds. DJ breaking point which is determined for each athlete was applied as DJ jump height after vibration. Just after the fatigue protocol was completed, athletes’ CoP- sway measurements after fatigue were practiced on force plate. Different frequency measurements taken to analyse the effects on DJ height of frequency at specific amplitudes were evaluated by ANOVA analysis. Based on variance homogeneity test, the Tukey or Tamhane methods were used for multiple comparisons. A statistical analysis with a paired Student’s t test was used to compare pre-vibration and post-vibration treatment values of jumping height at the DJ test. DJ performance is affected by WBV stimuli in different frequency, CoP- sway values and especially fatigue situation in AP direction insert ignore into journalissuearticles values(p<0.05);. In conclusion, 30Hz-35Hz and 40Hz WBV stimuli has an acute effect on DJ performance beside that 35 Hz WBV definitely has the greatest effect.
Keywords : CoP sway, drop jump, postural control, fatigue

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