The aim of this study is to determine the influence of motor skills (repetitive strength and coordination) on the success of performance freestyle swimming before and after the completed swimming training program. The research was conducted on a sample of 90 students, both male and female, aged 11-12, the fifth grade of primary school students from Novi Grad municipality in Sarajevo, with 6 motor variables and 1 criterion variable. A regression analysis was used to determine the effects of repetitive power and coordination on the performance of freestyle swimming. By analyzing the presented results of the regression analysis it can be concluded that after the initial measurement of the variables for the repetitive power estimation, the most important and statistically significant influence on the criterion variable OCJTEH had the following predictor motor variables: MRSDTZ (BETA) = 0.217, which is significant at p = 0.033, MRSSKL (BETA) = 0.285, which is significant at p = 0.007, MRSDCU (BETA) = 0.383 which is significant at p = 0.000, and in coordination the following predictor motor variables: MKOPRP (BETA) = 0.393, which is significant at p = 0.001, MKOPRL (BETA) = 0.198, which is significant at p = 0.049, MKOOUZ (BETA) = 0.268 which is significant at = 0.004. After the final measurement of the variables for the assessment of motor abilities (repetitive forces and coordination) the most significant influence on the OCJTEH criterion variable (swimming for 25 m free technique) had the same variables as in initial measurement: at repetitive force variables – MRSDTZ, MRSSKL, MRSDCU, in co-ordination variables – MKOPRP, MKOPRL, MKOOUZ. Article visualizations:

The goal of this research is to determine the differences between spinal deformities of students in urban and rural areas with regard to the initial and final measurements. This research was conducted on a sample of 1105 students. This research program includes students from the first to the fifth grade in the following 11 elementary schools in Sarajevo. Method of measuring the curvature of the spine based on Napoleon Wolanski ’ s criteria from 1975 entitled D-5 spine posture (ESP). The analysis of spinal deformity of students in urban and rural classrooms was done by using the descriptive chi-square statistics. It has been determined that in the initial measurement, a greater number of examinees with no spinal deformity came from the rural schools. The examinees from the urban schools displayed first- and second-degree spinal deformity. In the final measurement, a greater number of examinees without spinal deformity came from rural schools, 28 (2%) to be precise. There was also a greater representation of first-degree spinal deformity in the examinees from urban schools, 49 (8%) to be precise. However, the representation of second-degree spinal deformity was not present in either of the examinees from rural or urban schools.

Explosive power is the dominant motoric ability in most sports, regardless of the age, gender and level of the competition, and as such participates in the equations of the specification. Vertical jump (Squat Jump) is a test for estimating the explosiveness of caudal extremities in a number of sports, most often in football, athletics, basketball, volleyball. The study included a sample of 39 respondents (19 cadets, ages 15 ± 0.5 years and 20 juniors, age 17 ± 0.5 years). The aim of this study was to determine the differences in the strength of the leg springs between players of junior and cadet ages. For the estimation of explosive power, the Squat Jump was measured using the Chrono Jump contact mat tensiometric platform (Bosco System, Spain). The analysis of the T-test showed statistically significant differences at the level of p <0.000 in favor of boys of junior age. Article visualizations: