The trend of inappropriate diet and lack of physical activity among adolescents has been reported to increase for several years. What makes this fact alarming, is not only the current health and well-being of the adolescents, but also the health risks these individuals will face at higher age. In previous studies, the authors focused primarily on either individual effects of dietary habits, or on the consequences of (in)sufficient physical activity. In order to identify, which of these two factors has a greater effect on body composition in adolescents, we focused on these two factors in a single study. Data were collected within a larger study entitled “Analysis of Children’s Development in Slovenia” (ACDSi). Data on weekly physical activity, anthropometric, and nutritional data were collected. Adolescents were first divided into three groups (underweight, optimal, and overweight) according to their body composition. Then, daily time for their moderate and vigorous physical activity and HuSKY index, based on food intake, were calculated. Parametric data were analyzed with analysis of variance and non-parametric data with Chi square test. Results showed that adolescents with optimal body composition were more physically active than those with non optimal body composition. However the (in)appropriate dietary habits were similar in both groups of adolescents.
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