Bojan Bjelica

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The aim of the research was to determine effects of group fitness programs of different intensity on changes in body composition. The sample comprised 90 women, aged 25 to 35. The sample consisted of two experimental groups, Zumba (n=30), Fitness (n=30), and one control group (n=30). The applied variables for assessment and changes in body composition were: total body fat (%), total muscle mass (kg), right arm fat (%), left arm fat (%), right leg fat (%), left leg fat (%), torso fat (%). Differences between the groups for each variable were determined through a univariate analysis of variance (ANOVA) and with the LSD Post Hoc test. Based on the results of the study, statistically significant differences were determined in all tests except in left and right arm fat (%). Muscle mass increase was most prominent in the experimental Fitness group (.000), whereas reduction in body fat was most prominent in the Zumba group (.035). It can be concluded that implemented experimental exercise programs, as well as the applied intensity of maximum heart frequency in the experimental groups (Zumba 65-85%; Fitness 55-75%) significantly impacted the changes in body composition at the final measuring, in comparison to the initial one.


Body Fat, Muscle, Zumba, Physical Activity

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