The aim of the research was to determine the effects of applied technical and tactical characteristics of table tennis players on their success in competitions. The representative sample consisted of 48 top senior table tennis players from Bosnia and Herzegovina, age 18 and 36, selected on the basis of a qualification tournament. The measuring instruments for this study included eight assessment tests for the table tennis players' technical and tactical characteristics and one test for assessing success in table tennis competitions. Technical and tactical characteristics of the participants were evaluated by five experts who analyzed the efficacy of technical and tactical characteristics of the players on a scale ranging from 1 to 5. The methods of processing the results included descriptive statistical procedures, the multiple correlation coefficient, the determinant coefficient and a multiple regression analysis. The results indicate that technical and tactical characteristics have a major impact on the player's performance and are essential for table tennis success. Based on the value of the regression coefficients and their significance, it may be concluded that the 5 variables statistically significantly contribute to the regression model are: the efficiency of the serve; the efficiency of preventing the attack of the opponent and preparation of the players’ own attack; confidence when attacking across the table; the efficiency in the active defence and the efficiency of movement during the game. In the hierarchy of significance, the most important variables are the serve efficiency and efficiency of preventing the attack of an opponent and preparation of the player's own attack. The efficiency of the serve allows an attacker to realize technical and tactical ideas and usually gain initiative in the game. By returning a serve we can prevent or at least make it harder for the opponent to attack again. A serve return can also allow us to take the initiative

SUMMARY:The aims of this study were to investigate the association of body mass index with different dimensions of selfperception and the level of self-esteem among female students of first and second year at the University of Tuzla. The study was conducted on a sample of 120 female students of the first and second year at the University of Tuzla. The study used the following instruments: Rosenberg Self-Esteem Scale (ROSF), Questionnaire PD/form A and Body Mass Index calculation. Results indicate that self-esteem and self-worth, and a sense of comfort and discomfort affect the experience of body perception unrelated to body mass index. It is also determined which variables are significant predictors of the experience of body perception and the level of self-esteem in the examined sample. The obtained results indicate a significant correlation between self-perception and sense of well-being related to body image on self-esteem among students in the study sample, which may not be related to actual body appearance in terms of reduced or increased body weight.

Sažetak:Istraživanje je provedeno na uzorku vrhunskog bacača kugle, reprezentativca BiH, s ciljem utvrđivanja značajnosti i veličine uticaja uglovnih vrijednosti (A) segmenata tijela u projekciji (z) ose na dužinu izbačaja kugle 0.1 s prije izbačaja. Uzorak varijabli predstavljali su uglovni položaji (A) segmenata tijela snimljeni 0.1 s prije izbačaja kugle, njih dvadeset jedan, koji su činili prediktorski skup varijabli. Prilikom izbora varijabli vodilo se računa da one zadovoljavaju osnovne metrijske karakteristike (validnost, relijabilnost, objektivnost, osjetljivost) i usklađene sa tehnologijom i instrumentarijem koji je korišten prilikom snimanja i utvrđivanja njihovih kinematičkih parametara. Za utvrđivanje značajnosti i veličine uticaja kinematičkih parametara pojedinih segmenata tijela bacača kugleuglovnih (A) vrijednosti u projekciji (z) ose 0.1 s prije izbačaja kugle (prediktorski skup varijabli) na dužinu izbačaja (domet) kugle (kriterijska varijabla), primjenjena je regresiona analiza. Rezultati regresione analize ukazuju na to da postoji statistički značajan uticaj uglovnog položaja (A) segmenata tijela u projekciji (x) ose na dužinu izbačaja kugle 0.1 s prije izbačaja. Analizom uticaja pojedinačnih varijabli uglovnog položaja (A) u projekciji (z) ose, može se vidjeti da najveći i statistički značajan pozitivan uticaj na kriterijsku varijablu, dužina izbačaja u vremenu 0,1 s prije izbačaja ima varijabla, uglovni položaj lijevog ramena u nivou sedmog vratnog pršljena (AzLC7R). U trenutka izbačaja do 0.1 s prije ugaonog položaja lijevog ramena u nivou sedmog vratnog pršljena u osi (z) došlo je kao posljedica povezanosti uglovnog (A) kretanja u vertikalnom opružanju tijela ose (z) u odnosu na projekciju kretanja sprave odnosno trenutka izbačaja. When selecting variables, it was taken into account that they satisfy the basic metric characteristics (validity, relievability, objectivity, sensitivity ...) and that they are aligned with the technology and instrumentation used to capture and determine their kinematic parameters. In order to determine the magnitude and size of the infl uence of kinematic parameters of the individual shot put elements (A) in the projection (Z) or 0.1 s before the ball spout (predictor set of variables) on the length (range) of the sphere (criterion variable), regression analysis was used. The regression results of the analysis indicate that there is a statistically signifi cant infl uence of the angle position (A) of the body segments in the projection (X) or the length of the sphere 0.1 s before the throw-out. Analysis of the infl uence of individual variables of the angular position (A) in the axis (Z), shows that the most statistically positive impact on the criterion variable length in the ejection time of 0.1 seconds before ejection has a variable angular position of the left shoulder of the level of the seventh cervical vertebra ( AzLC7R). The time span up to 0.1 seconds before the angular position of the left shoulder to the level of the seventh cervical vertebra to the...

The research was conducted on a sample of 70 respondents-swimmers aged 13-15 years of swimming clubs from Sarajevo Canton/Federation of BiH, with the aim of determining the significance and magnitude of the impact of selected basic motor skills on the implementation of specific motor tasks in swimming (navigability in place, sliding length with reflection from water, start from starting block, parallel). The study used 10 variables to assess basic motor skills, which were the input or predictor set of variables, and three variables to assess the efficiency of specific motor tasks in swimming as a criterion, each variable from the battery of specific motor tasks was considered as a criterion on the predictor set of basic-motor variables. Three mini regression analyzes were applied to determine the statistical significance and relative influence of basic motor skills on the realization of specific motor tasks in swimming (buoyancy in place, length of sliding with reflection from water, start from the starting block, parallel). The results of regression analyzes indicate that the greatest influence on the overall efficiency in the implementation of specific motor tests in swimming, looking at all criterion variables together, from the set of basic-motor variables, as a predictor set, show the following variables: stick twist-MFLISK MFLPRK, plantar flexion-MFLPL, long jump from place-MFESDM, agility on the ground-MKOKNT and shelter in lying-MRCZTL. The results obtained in this research can be useful for teachers and swimming trainers who work with younger age categories for the purpose of better programming of training work and selection of training content.

The aim of this research is to determine the differences between the aerobic functional abilities of football players from different positions in the team, which should serve as a starting point in planning and monitoring the training process of football players. VO2max, as a basic parameter of functional abilities, was obtained by applying a laboratory progressive test on the treadmill. The sample of respondents was composed of 57 respondents (GOD = 22.47 ± 3.78SD), football players of clubs competing in the first and second leagues of Serbia from the area of Vojvodina, of which 8 goalkeepers, 16 defensive, 17 midfielders and 16 attackers. To test the functional capabilities (oxygen consumption - VOmax), we used a test of progressive continuous load on the treadmill with increasing load per minute through a "breath-by-breath" gas analyzer (Quark PFT ErgoCPET, Cosmed, Italy), which gave data on ventilation and spiroergometric parameters of the subjects by different positions in the team. Anthropometric measures of body weight- (TM) and body height- (TV) were applied to test the morphological characteristics of the subjects. SPSS 20.0 software package was used for data processing. In order to determine the statistically significant differences of the measured variables between football players by positions, a one-factor anova of different groups, the level of statistical significance (p <0.05) was used. The obtained results of maximum oxygen consumption indicated that there is a statistically significant difference in aerobic abilities between goalkeepers and players in other positions, and they are certainly a consequence of the physiological requirements placed before them and the different training process. The highest mean value of VO2 max had midfielders (53.3 ± 1.9 ml / kg / min), followed by attackers (52.9 ± 4.4 ml / kg / min), defensive players (51.8 ± 3, 3 ml / kg / min) while the lowest values were recorded in the goalkeeper (50.5 ± 1.8 ml / kg / min). There is a logical conclusion that the need for running midfielders is the greatest, and the goalkeeper the least, and that the results are the result of training processes and different requirements for individual positions in the team.