Evaluacija uspešnosti balističkih pokreta - varijable za procenu preciznosti i brzine šuta
Evaluation performance of ballistic movements - variables for assessement the accuracy and kicking velocity
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Primarni cilj izvršenih istraživanja je bio da se ispita pouzdanost i osetljivost
varijabli za direktnu procenu preciznosti i brzine šuta, kao dve važne karakteristike šuta.
Sekundarni cilj ovih istraživanja je bio da se utvrdi minimalan broj ponavljanja koji je
dovoljan za prihvatljivu pouzdanost podataka u protokolima za procenu preciznosti i
brzine šuta.
Pouzdanost varijabli za direktnu procenu preciznosti i brzine šuta u fudbalu
(Eksperiment 1)
U istraživanju pouzdanosti varijabli za procenu preciznosti i brzine šuta testirane
su hipoteze: 1) varijable za direktnu procenu preciznosti, zasnovane na merenju
standardnih grešaka, imaju umerenu pouzdanost i 2) varijable za direktnu procenu
brzine šuta imaju visoku pouzdanost.
U istraživanju su učestvovala 53 fudbalera, sa šireg spiska nacionalne selekcije
uzrasta 12 i 13 godina. Apsolutna (AG), konstantna (KG) i varijabilna (VG) greška su
korišćene za procenu sposobnosti pogađanja u metu, dok su brzina leta lopte pri
maksimalnom šutu (B...LLmax), brzina leta lopte pri preciznom šutiranju (BLLprec), kao i
međusobni odnos ove dve varijable (BLLprec/BLLmax) korišćeni za vrednovanje brzine
šuta.
Rezultati pouzdanosti i minimalanog broja ponavljanja, dobijeni u ovom
istraživanju, ukazali su da AG i VG mogu biti varijable korišćene u rutinskim
testiranjima za procenu karakteristika šuta. Nasuprot tome, utvrđeno je da zbog izuzetno
niske pouzdanosti KG nije dovoljno dobra varijabla za korišćenje u rutinskim
testiranjima procene preciznosti. Kada su u pitanju varijable brzine šuta nogom BLLmax,
BLLprec i BLLprec/BLLmax, one mogu biti korišćene u rutinskim testiranjima karakteristika
šuta, na šta su ukazali pouzdanost rezultata i potreban minimalan broj ponavljanja.
Na osnovu dobijenih rezultata može se zaključiti da su varijable za direktnu
procenu preciznosti i brzine šuta evaluirane i prihvatljive za dalju primenu u
istraživanjima, kao i u praksi, gde se mogu koristiti u kreiranju valjanih i efikasnih
vii
protokola testiranja, posebno kada se uvaže podaci o predikciji broja neophodnih
ponavljanja...
The primary aim of the present study was to investigate the reliability and
sensitivity of variables for the direct assessment of the kicking accuracy and velocity,
while the secondary aim was to determine the minimum number of repetitions that is
sufficient for acceptable reliability of the applied protocols for assessing the kicking
accuracy and velocity.
Reliability of the variables for direct assessement of kicking performance in soccer
(Study 1)
In this study we tested two hypotheses: 1) the variables for the direct assessment
of kicking accuracy based on the measurement of the standard errors will reveal
moderate reliability, while 2) the variables for direct assessment of the kicking velocites
will reveal highly reliability.
The study included 53 young soccer players who were the members of the wider
selection of national team aged 12 and 13 years. Absolute error (AE), variable error
(VE), and constant error (CE) were evaluated as the variables of kicking accuracy,
whereas the k...icking velocity variables involved the maximum ball velocity (BVmax), the
ball velocity during accurate kicks (BVacc) and their mutual ratio (BVacc/BVmax).
Results suggested low-to-moderate reliability of the accuracy and high reliability
of the velocity variables. Since the evaluated variables should have a property of face
validity, the findings obtained generally suggest that AE (and perhaps VE, as the
measures of kicking accuracy), and BVmax, BVacc and BVacc/BVmax (as the measures of
kicking velocity) could be used for routine testing of kicking performance in soccer.
Further development of the evaluated variables of kicking performance could be
based on the involvement of other kicking techniques, as well as on the testing the
athletes of different ages, levels of skill, or sport specialization...
Faculty:
Универзитет у Београду, Факултет спорта и физичког васпитањаDate:
14-10-2013Projects:
- Muscular and Neural Factors of Human Locomotion and their Adaptation (RS-MESTD-Basic Research (BR or ON)-175037)