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Indexed/Abstracted in: Chemical Abstracts, CINAHL, Current Contents/Clinical Medicine, EMBASE, PubMed/MEDLINE, Science Citation Index Expanded (SciSearch), Scopus
Impact Factor 1,111
Online ISSN 1827-1928
Kabacinski J. 1, Dworak L. B. 2, 3, Murawa M. 1, Ostarello J. 4, Rzepnicka A. 1, Maczynski J. 1
1 Department of Biomechanics, University School of Physical Education, Poznan, Poland;
2 Department of Bionics, University of Arts, Poznan, Poland;
3 Department of Rheumatology and Rehabilitation, Poznan University of Medical Sciences, Poznan, Poland;
4 Department of Kinesiology, California State University, East Bay, Hayward, CA, USA
AIM: The purpose of the study was to compare the take-off dynamics in counter-movement jump (CMJ), volleyball block and spikes.
METHODS: Twelve professional female players, representing the highest volleyball league in Poland, participated in the laboratory tests. A force platform was used to record ground reaction force (GRF) during take-off phase in CMJ test, block from a run-up and spikes: front row attack, slide attack, back row attack. Vertical (v) GRF (peak: Rmax and integral mean: < R >), impulse of vGRF (J) and mechanical power (peak: Pmax and integral mean: < P >) were analyzed.
RESULTS: Significant differences (p<0.05) of values of the dynamic parameters (Rmax, < R >, J, Pmax, and < P >) were found between CMJ, block from a run-up and three different technique spikes. The highest values were recorded during take-off in the back row attack: peak vGRF (2.93±0.05 BW), integral mean vGRF (1.90±0.08 BW), impulse of vGRF (354±40 Ns), peak power (5320±918 W) and integral mean power (3604±683 W). Peak power (2608±217 W) and integral mean power (1417±94 W) were determined in CMJ test to evaluate the force-velocity capabilities of the players.
CONCLUSION: In terms of GRF and the mechanical power, high level of dynamics in take-off influences positively the jumping height and significantly increases the effectiveness of attacks during spike of the ball over the block of the opponent.