This study presents the results of empirical research conducted with the aim of analyzing differences in the physical activity of children in relation to the socio-economic characteristics of their families. The research was conducted by applying a questionnaire distributed to pupils aged 11-12 years, who live in the city of Novi Sad (the city and the village of Rumenka, Veternik, Kac, Bukovac, Futog). Bearing in mind that the work is a part of a broader research, the authors' attention was focused on the objective, and the evaluation of the respondents on the socioeconomic status of the family, as well as differences in physical activity among boys and girls, and children who live in urban or rural setting. As dominant in this study stands out the finding of the author that the socioeconomic characteristics of families significantly affect the intensity, form and quality of physical activity of children. Since such a finding puts children living in families with low socioeconomic status into a disadvantaged position, the authors believe that with the findings of this and compatible researches it is needed to familiarize with the wider academic community, in order to include other social institutions in the process of affirmation of physical activity as an important lifestyle quality in children and youth. 

Skill-based training has been developed in order to combine the skill and conditioning elements
in a coordinated approach. Our aim was to determine the effects of skill based conditioning
training on power and COD speed in youth female volleyball players. Sixteen young female
volleyball athletes (15±2 years) consented to participate in lower-body power and COD speed
testing.Players were involved in six weeks skill-based conditioning training during in-season.
There were no significant differences between pretraining and posttraining for Block jump and
Spike jump. Moreover, there were no significant (p > 0.05) improvements in Standing broad
jump also.However, compared with pretraining, there was a significant improvement in COD
speed tests. Training induced significant (p ≤ 0.05) improvements in 9-3-6-3-9 test (p<0,001) and
Side steps 10x4.5 m (p<0,001).In conclusion, skill-based conditioning training appears to have
stronger effects in improving COD speed compared to lover body power young female
volleyball players. Volleyball coaches could use this information in the process of planning the
in-season training.

The subject of this study are metric characteristics of specific football tests. 27 football players
chronorogical age of 13-15 years, apropos categories of elder pioneers from HNK Cibalia
Vinkovci, Croatia. The participants had to go through specific tests with the ball: 20 m sprint,
zig-zag, slalom, and 9-3-6-3-9 test. We can conclude that all four variables are highly reliable.
The homogeneity of the measuring instrument is good (20 ml) and excellent( zig-zag L, slalom
L, 93639 L), and results of skewness and kurtosis further show good sensibility of the measuring
instrument, with the exception 20 m L2 variable, which is positive asymmetrically distributed
and elongated. The correlation of particles with first main component, which is second condition
for homogeneity of the measuring instrument, points on high homogeneity of all tests. Regular
distribution of all test implies on satisfactory reception of all four tests for assessing the speed
and agility. The factor analysis has given one significant component and the amount of explanied
variance and size of characteristic valuables are high, so we could confirm also factorial validitiy
of tests. The results of the variance analysis (ANOVA) conclude that the tests are pragmatically
valid, and they distinguish players from different playing lines.

The goal of this study was to examine the influence of dancing and game contents on
preschoolers’ motor engagement in each phase, as well as total engagement in directed motor
activities. The study was realized in the first term of 2014/2015 school year. 12 activities with
dancing contents and 12 activities with moving games were monitored. The duration of directed
motor activity phases was as follows: the first A phase (introductory) – five minutes, the first B
phase (preparatory) – five minutes, the second phase (main) – fifteen minutes and the third phase
(final) – five minutes. The time of the activity (engagement) was measured by random choice of
one of the children, who was monitored during the directed activity. The observed child did not
know that he/she was an object of measurement. Data processing included descriptive statistics
and t-test for small independent samples. The parameters of descriptive statistics indicate longer
engagement of children in the first A phase, the third phase and total engagement with dancing
contents. Game contents influenced higher engagement in the first B phase and the second phase.
Game contents influenced statistically significant difference in relation to dancing contents in the
third phase. The total engagement with the dancing contents was 725 seconds, with game
contents 707 seconds. The t-test does not indicate statistically significant difference between
dancing and game contents in terms of preschoolers’ total engagement. The results indicate that
the activities with dancing and game contents are very useful in working with preschoolers.
Keywords: dance, game, engagement, directed motor activity, preschoolers

Pregnancy is a physiological condition during which a series of morphological and anatomical
changes occur. Adaptation to new changes in the body depends on the psychological and
physical condition of the patient. One of the many factors that affect the quality of life is physical
exercise. Proper exercise prevents certain chronic diseases, reduces pregnancy discomfort, gives
a feeling of satisfaction and influences a positive outcome of the pregnancy. The aim of this
study was to examine the validity of the preliminary version of the questionnaire, and therefore
examine the impact of exercise on the quality of life during pregnancy. The questionnaire
involved pregnant women (N=33). All of whom were in their third trimester of pregnancy. The
participants voluntarily filled out an anonymous questionnaire. The questionnaire included
information about: social and marital status, education, frequency of maternity problems, the
type of exercise, as well as the level of training load during pregnancy. High reliability and
validity of the survey (0,873) was determined by Cronbach alpha coefficient. Pregnant women
(48%) commonly practiced low intensity yoga, up to three times a week. Most of the women
(45%) believe that the exercise has a positive impact on their health. A difference of statistical
significance was observed between the type of exercise and heart burn (r=0.349; p=0.046), as
well as between the type of exercise and body weight (r=0.357; p=0.041). The results of this
pilot study show a lower incidence of common maternity symptoms in pregnant women who
exercised during pregnancy. 

The purpose of this research was to establish the expert model of learning and evaluation the most important methodical exercises for teaching short skiing turns in advanced skiing school. Participants were 20 skiing experts from different states. After the experts model was established, experts selected 5 most important methodical exercises for teaching short skiing turns. According to with the goal of the research, total frequency sum of expert choice of the most important methodical exercises has been used (O-observed; E-expected), while the difference between frequencies of expert evaluation has been tested by non-parametric Chi-square test (χ²) and statistic meaning of differences (p). By natural selection, the ranking was made, and selection of the most important methodical exercises for teaching short skiing turns. After data processing, statistical differences were significant in frequencies in which experts choose most important methodical exercises (c2=17.30; p=0.14) while the differences between the values of most important methodical exercises were not established (c2=2.15; p=0.91). Statistical differences based on nationality were not established. Based on the obtained results it can be concluded that the experts in spite of the structural differences and specificity within each ski schools are equally recognized and valued those most important methodical exercises who contain the basic characteristics of effective lessons. This research is a foundation for future modeling which has made a selection of significant errors and exercises for their elimination, and their hierarchical classification. 

The aim of this study was to compare physiological responses during arm and leg aerobic power tests. Ten elite female judokas of the Serbian National Team participated in the study. In addition to the Special Judo Fitness Test (SJFT), maximal oxygen uptake (VO2max) and anaerobic threshold (AT) were determined using an arm crank ergometer and a treadmill. Body fat percentage was estimated by bio-impedance.  The VO2max was only 3 ml∙kg–1∙min–1 higher on the treadmill than in the arm crank (p<0.03), the AT was also higher on the treadmill test (8.6 l∙min1, p=0.005). Nevertheless, the SJFT results were significantly correlated only with the maximal heart rate during the treadmill test (r=0.77, p<0.01 for index; r=-0.73, p<0.02 for total throws). Body fat percentage was correlated with VO2max (r=-0.67, p<0.05) and AT in the arm crank test (r=-0.88, p=0.001). The maximal oxygen uptake was not statistically correlated with the SJFT results in elite female judokas. However, judokas who had higher maximal heart rate during the treadmill test, showed a worse judo-specific capacity on the SJFT. Female judokas with higher body fat seem to have lower VO2max and AT, with statistically significant correlations in the arm crank, and close to significance on the treadmill. On the other hand, arm crank and treadmill tests presented different results concerning aerobic capacity. However, our female judokas interestingly presented similar VO2max results during both aerobic tests, which highlights some judo-specific demands on the upper-body aerobic fitness. 

The purpose of this survey is to establish whether, and in which manner, different sources of stress predict the partner relationship quality, as well as to establish differences concerning the gender, age and job of respondents. Sources of stress are defined as individual, interpersonal and organizational, whereas the quality of partner relationship was tested as a degree of satisfaction with the romantic relationship. The survey was conducted on an adequate sample of 100 respondents involved in a partner relationship, similar in terms of gender and aged 18 to 44. Questionnaires were used to measure the sources of stress and partner relationship quality (Hendrick, 1988). The results indicated that all three sources of stress were significantly connected with the partner relationship quality, also that family-related sources of stress were the only significant predictor (β= 0.286, p<0.01). The greater the family-related sources of stress, the poorer the partnership relation quality. Differences were obtained in assessing the individual factors of stress according to gender and age categories. 

Since previous studies suggest a relationship between motor and cognitive development in children, a research was conducted in order to examine the differences in motor skills of children with different levels of intellectual ability. In a sample of 88 respondents, boys and girls aged 7, an assessment of motor skills was performed by using the battery of seven motor tests and assessment of intellectual abilities by using the test of Raven's Coloured Progressive Matrices. Respondents were divided into three groups according to the results of the test. After analyzing the results of the research it was shown that there were no statistically significant differences in the area of motor abilities of children of different intellectual levels, but there were differences at the univariate level regarding the tests Hand Tapping and Seat-and-Reach. 

Monitoring postural and nutritional status is very useful for sheding light on problems in the process of growth and development of children. The aim of this study was to determine the difference in postural status of younger-aged school children of urban and suburban environment according to their nutrition. Research sample included 497 male and female pupils from Novi Sad (251) and suburban environment (246), aged 11 and 12. Postural status was assessed using the method of somatoscopy and nutrition level with BMI calculator. The relation between the category of nutrition and the incidence of postural disorders was tested using a chi-square test at the significance level of p≤0.05. The results show a statisticaly significant difference in pupils in terms of sagittal spine plane, chest and feet according to their nutritional status. Lordotic bad posture (p=0.008), right lumbar scoliosis (p=0.007), high arch foot (p=0.043) and flat feet (p=0.007) were the most frequent postural disorders in the normal weight pupils. The incidence of kypholordotic posture (p=0.005) and flat-chest (p=0.002) was significantly higher among pupils from suburban environment. The incidence of kypholordotic posture (p=0.012) was significantly higher in over-nourished pupils from the suburban environment. Postural disorders and nutritional abnormalities significantly increase in children of the urban and suburban environment. Therefore, it is necessary to provide adequate conditions and include them in an organized physical exercise in order to prevent the occurrence of postural disorders and disorders of the nutritional status.