engleski

Functional assessment of movement with the aim of establishing asymmetry in the range and quality of motion in volleyball players „HAOK Mladost“.

Purpose: The main goal of this study is to determine possible asymmetry in the range and quality of movement in senior volleyball players. Methods: Respondents were nineteen (n=19) male volleyball players, all right handed, healthy and members of „HAOK Mladost“. The testing was conducted during the second week of the preparation period. We used five tests which can indicate asymmetry, all five part of standard FMS protocol (Hurdle Step – HS, In-Line Lunge – ILL, Shoulder Mobility – SM, Active Straight Leg Raise – ASLR, Rotary stability – RS). Educated staff at the Faculty of Kinesiology, University of Zagreb conducted the testing. The examination of significance of the differences between the left and right side of the body was conducted by using the nonparametric Wilcoxon Signed Rank. Results: Statistical analysis showed significant difference only in one test: hurdle step (HS), z= - 2, 12, p=0.03, with moderate effect size (r=0.34). The results clearly point to the problem of reduced stability of the right leg, reduced mobility of the left leg, and reduced mobility in the left hip joint. Conclusion: The cause of asymmetry could be the unilateral technique of landing after offensive and defensive jumps (predominantly left leg for right handed players) which can cause loads that lead to micro traumas, and ultimately, to lower stability and mobility of the entire kinetic chain on the left side of the body. Consecutive single leg landings may occur due to the wrong motion pattern caused by the poor strength of an athlete's body, inadequate spiking technique (non-symmetric hand swing during the preparation phase of the spike) or inaccurate setting. Considering the obtained results, corrective exercises should be carried out in two directions. The first relates to the development of stability of the right leg and the second to the development of mobility of the left leg and left hip. Adoption and stabilization of proper spiking and setting techniques are implied.

volleyball ; stability ; mobility ; FMS

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