european college of sport science

Wednesday, June 24th, 2009
DIFFERENCES IN PROPRIOCEPTIVE QUALITIES OF THE FOOTBALL PLAYERS AT DIFFERENT LEVELS OF COMPETITION IN
BOSNIA AND HERZEGOVINA
HARIS, A., RAðO, I.
FACULTY OF SPORT AND PHYSICAL EDUCATION, UNIVERSITY OF SARAJEVO
Introduction: Football game comprise all forms of natural movements as running, stopping, turning, jumping, falling, throwing, pushing,
and occur with different intensity, tempo and duration, with purpose of defending and attacking actions (Raño et al., 2002). Balance
abilities of players are very important for the function of maintaining adequate body posture while shooting, pushing, and landing, and
especially for injure preventing. Purpose of the research was to find differences in balance ability, propriocetive qualities of players at
different levels of competition in Bosnia and Herzegovina.
Methods: Study from the season 2007/2008, involved 129 players, seniors, from different level of competition (five levels): level-I (National
team), level-II (Premier League), level-III (First League), level-IV (Second League) and level-V (Cantonal League). Biodex Stability System was
used to test balance ability of players, stability level 4, duration of 20sec, stability index was recorded. T-test for independent samples
was used for difference determination between levels.
Results: Results of the study has shown statistically significant differences between third (First League) and fourth (Second League) levels.
p0.05; TS: 126.3±20.2 vs. 124.9±15.3 km.h-1, -0.4%, P>0.05). In the literature, contrasting effects
of fatigue on tennis serve efficiency have been reported depending on service type, nature of fatiguing protocol or subjects’ characteristics.
In the fatigued state, Fzmax was unchanged (P>0.05) in FS and SS (1.78±0.30 vs. 1.72±0.29 and 1.60±0.22 vs. 1.65±0.22 BW; -2.9 and
+3.8%; before and after the tennis match, respectively). In line with these findings, no significant changes in explosive strength - as
measured from squat and countermovement jumps - were observed after a tennis match protocol of the same duration. Unexpectedly,
our results also displayed an increased Fzmax (1.62±0.25 vs. 1.75±0.23 BW; +8.2%; P0.05) from pre- to
post-exercise.
Conclusion
After a prolonged tennis match, ball velocity remains unchanged while the effects of fatigue on the lower limb drive are different according
to the service type. This indicates a modification in inter-segments coordination that requires further kinematic and kinetic analyses
coupling.
OSLO/NORWAY, JUNE 24-27, 2009 71