engleski

Concentric Power Differences during Take-off between Young Male and Female Team Handball Players

Differentiating gender related manifestations of power through two-legged taking-off kinetic chains was main objective of this research. Basic techniques of exertion of power while jumping in team handball have major impact on individual and group tactics efficiency. Potential within individual player’s performance rise proportionally with greater variability, versatility and control of timing, intensity, function, structure etc. of concentric, eccentric and elastic component of muscular contraction. It is the case for individual sports like athletics (Čoh et al., 2013.), or gymnastics (Medved et al., 1995), therefore those are functionally reflected in specific take-off, throwing/shooting and sprinting techniques in team sports. Hypothesis of this research was that from certain age arising differences in observed characteristics are measurable by the height of jump, but by average concentric power as well. Participants were 41 young team handball player (24 male and 17 female) 16±1 y r., all member of national selection preparing for international tournaments (European Championships) in year 2006.Tensiometric Platform (Kistler factory) and standard Quattro Jump protocol was used to collect data (variables in table 1.) and to produce figures. Concentric, eccentric and elastic component of take–off were assessed trough Squat Jump (HSJ, PSJ), Countermovement Jump (HCMJ, FI, PCMJ, STR, FIBR), Continuous Jumps (HCJ, PCJ, KCJ) (BW and DELTAH included in formulas). Data was processed by statistical package Statistica for Windows 5.0 (StatSoft, Inc.). Basic measures of central tendency and dispersion, Pearson product-moment correlation, and t-test for independent samples were used to assess data, to produce figures, and to test main hypothesis. Descriptive statistics reveal gender based inconsistencies of processed signals. Correlations between rise of center of gravity (in HSJ, HCMJ and HCJ) and average concentric power (PCMJ, PCJ) were statistically significant in range 0.52-0.83. T-test confirmed hypothesis of existing differences in average concentric power between male and female subjects (PSJ: t=3, 75, p<0, 01 ; PCMJ: t=4, 46, p<0, 01 ; and with lower level of significance PCJ: t=1.77, p<0, 08). Indirectly, differences in concentric, eccentric and elastic component of take–off were confirmed with statistical significance in variables HSJ (t=5, 76, p<0, 01), HCMJ (t=6, 29, p<0, 01), and HCJS (t=3, 50, p<0, 01). Although estimated by standard Bosco protocol, observable statistically significant difference in percentage of used fast twitching fibres FIBR (t=3, 26, p<0, 01) go in line with previous results.

team handball ; gender related differences ; motor abilities ; explosive power ; muscular contraction

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