The World Health Organization (WHO) released guidelines for physical activity, sedentary behav-iour, and sleep for children under 5 years of age in 2019. In response to these guidelines, this study aimed to determine the proportion of preschool children (ages 3-5 years) who met the WHO guidelines. The time spent in physical activity, sedentary behaviour and sleep were objectively measured using accelerometer (ActiGraph wGT3x-BT). Screen time and sleep quality were assessed via parent questionnaire. Focus groups were con-1 ducted with parents and childcare staff to determine the feasibility of the protocol. The results showed that only 23% of the children met all three guidelines, and compliance rates varied for each guideline. The physical activity time guideline was met by 64% of children, the sleep duration guideline was met by 74% of children, and the screen time guideline was met by 53% of children. Only a low proportion of children met the WHO guidelines. The methods and devices used in this pilot study proved to be feasible and this has paved the way to conduct the main SUNRISE study in Bosnia and Herzegovina.

A system of fifteen variables (7 morphological and 8 variables for assessing postural status) was applied to a sample of 284 male and female students from the first to the third grade of primary school, with the aim of determining the differences between boys and girls. The results showed that there were statistically significant differences between the examined samples in the following morphological variables: in the first class (body weight and skin fold of the triceps), in the second class (body height, body weight, skin fold of the triceps and skin fold of the biceps) and in third grade (body height, skin fold of triceps, skin fold of back, skin fold of biceps, and skin fold of lower leg). Statistically significant differences in the variables for assessing postural status exist in the following variables: in the first grade (head posture, shoulder posture, shoulder posture, chest shape and leg shape), in the second grade (shoulder posture, chest shape, and spinal deviation in frontal plane) and in the third grade (deviation of the spinal column in the frontal plane, holding the anterior abdominal wall and the shape of the legs). Based on the obtained results, it can be concluded that in the younger school-age in morphology there is a significant sexual dimorphism and with it in connection with the change of postural status.

In order to monitor the intensity of work during one hour of physical and medical education in 37students of the Faculty of Philosophy Department of Classroom Teaching in Tuzla, the measurement of the effects of work through the application of polygon barriers was performed as the most complex methodological-organizational form of work. The effects of working and mastering the polygon through the particular phase of the clock (introductory, main A and B) are expressed by the number of heart beats. The heart rate measurement was performed by palpation of the artery radial at the beginning and end of each phase of the clock. During the measurement period, rest was also involved that had the role of a transitional factor from the submaximal / maximal values of the heart rate to the values that would bring near the possibilities and state of the organism to the completion of the final phase of the clock. The results obtained by this research show that the heart rate values in all phases of the clock differ significantly between each other and that the highest intensity of work is achieved in the main B-hour phase, indicating the appreciation of the physiological and emotional load curves that prevail over the course of physical and health education . This suggests that the polygon barrier as the most complex method-organizational form of work contributes to the intensification of work during the class of physical and medical education.

Based on a sample of 112 boys seventh and eight grade of Elementary school, age 13 to 15, we applied system of 21 variables, among them 18 variables were to estimate motor abilities and 3 were to estimate situational-motor abilities in volleyball and all is to determine mutual relations. According to results gained with appliance of canonical correlation analysis we can conclude that relations between observed group of variables – motor ability (as predict group of variables) with criteria group of variables (situational-motor abilities) will result with statistically significant coefficient of canonical correlation.