Anthropometric characteristics, represent one of the most important subsystems within the “system” of man, and which can be in affected by physical exercises in the direction of the desired transformation. Very often the anthropometric parameters (height and weight) are used in the assessment of the morphological status of an individual, and on the basis of the results of Body Mass Index (BMI) bring certain estimates and conclusions. BMI as a statistical measures, is used in many public health campaigns as an approximate measure of the ideal body mass and the degree of nutrition of a population. The main goal of the research was to determine and analyze differences in BMI parameters between male and female students, aged 18±0.5 years, and determine the trend of changes. Using the T-test module, the obtained results confi rmed that there are statistically signifi cant differences in body height (t=8,17; p<0.001) and body weight (t=5,29; p<0.001), while in BMI values there are not statistically signifi cant differences (t=-0.68, p>0.001). Based on BMI values, a positive trend of somatic changes of both poles is evident. Research Article The body composition analysis: Differences between students and the trend of their change Ratko Pavlović1*, Zoran Radić2, Irina Juhas3 and Mensur Vrcić4 1Faculty of Physical Education and Sport, University of East Sarajevo, Bosnia and Herzegovina 2Faculty of Physical Education, Sport and Health, University of Skopje, Macedonia 3Faculty of Sport and Physical Education, University of Belgarde, Serbia 4Faculty of Sport and Physical Education, University of Sarajevo, Bosnia and Herzegovina *Address for Correspondence: Ratko Pavlović, Faculty of Physical Education and Sport, University of East Sarajevo, Bosnia and Herzegovina, Email: pavlovicratko@yahoo.com Submitted: 09 March 2018 Approved: 21 March 2018 Published: 22 March 2018 Copyright: 2018 Pavlović R, et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Objectives: Anthropometric traits are closely related to health improvement as well as motor skills, psychological and sociological development. Therefore, the aim of this study was to investigate the differences in anthropometric traits of high school students and trend of changes among them. Methods: The anthropometric parameters including weight, height and body mass index (BMI) were measured in 60 male and female students, aged 17 ± 0.5 years. Descriptive statistics and t-independent test was used to analyze the data. Results: The results suggested that there were statistically significant differences in the height (t = 7.40; P < 0.000) and body weight (t = 3.62; P < 0.001) of male and female students, while no significant difference was found in BMI values in the two groups (t = -0.33, P > 0.001). In addition, it was suggested that 68% of male and female high school with mean BMI of 25 and 13 respectively, had normal nutrition status. 14.6% of male and 10.5% of female students had malnutrition. 21% of female students and 17% of male students had an excessive malnutrition. Conclusions: Although, today’s development is moving towards the advancement of technology, the life style especially nutrition status and physical activity needs to be seriously considered. However, mush research is needed to understand the effective factors on life style of different age groups especially students who are so involved in threaten of hypokinesian lifestyle.

The aim of this study was to examine connection between the motor ability strength and the achievement of results in sprinting in order to define strength tests to perform selection in physical education classes, at the age of early puberty. The sample consisted of 88 female subjects aged 12 years (± 6 months). The batery of four tests was used for evaluation of the motor ability strength, prescribed in the curriculum for the subject Physical Education of the Pedagogical Association of Vojvodina: variables of explosive strength standing broad jump (cm), throwing medicine ball from lying position (m), variable of repetitive strength sit-ups (number of successful attempts) and variable of isometric strength bent arm hang (s). For evaluation of the motor ability speed, the standardized test was applied, which represented the criterion variable the result obtained in 60 m run (s). The relationship between the system of predictor variables and the criterion variable is calculated by linear regression analysis, and the results showed that, on the basis of the results of the predictor variables system, the level of sprinting speed can be statistically significantly predicted. By observing the individual variables, it can be seen that the variables standing broad jump (p=0.00) and sit-ups (p=0.00) achieve statistically significant prediction of 60 m run speed. By analyzing the results of regression analysis, it can be assumed that the result of the 60 m run in selected subjects can be predicted based on manifestation of explosive leg strength and repetitive strength of torso.

The aim of the study was to determine and verify the effectiveness of various teaching approaches on changes in the level of volleyball performance in the process of teaching volleyball to pupils in primary schools. In the experimental group was used the tactical approach and in the control group the techniques (traditional) approach in teaching of volleyball. The experimental group consisted of 26 pupils and the control group consisted same number of pupils. Both groups, representing 13 to 14 year old schoolgirls in primary school. Efficiency of the teaching approaches was evaluated based of game performance. Game performance was evaluated by the method of game performance assessment based on GPAI (Game Performance Assessment Instrument) through video record. To perform statistical evaluation Mann-Whitney U-test was used. When we evaluate the tactical component of game performance “position”, we found out that the difference between groups is not statistically significant (p > 0.05). By comparison “decision-making” it was discovered that the difference, between achieved performances in groups it is statistically significant (p < 0.05) in favour of the experimental group. By comparison skills execution we found out, that the difference between both groups in “serving” is not statistically significant (p > 0.05). But by comparison of passing, setting, offensive hit and team’s game performance” we found out statistically significant (p < 0.05) the difference between both groups in favour of the experimental group. The acquired data pointed to the fact that in generally the tactical teaching approach appears to be a more efficient method for acquiring game skills and tactical components of the game.