Katarina Simonović, Aleksandra Stanković, Katarina Šlljivić, Maja Nikolić

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Physical activity (PA) remains the most important modifiable risk factor in chronic diseases prevention. Instruments to assess physical activity, especially for youth, are needed for (inter)national monitoring systems and comparison. The aim of the present study was to test the validity of the International Physical Activity Questionnaire (IPAQ) in a group of urban Serbian adolescents. We hypothesized that the IPAQ has good validity compared with the objective standard (pedometry) in this population. Convenient sampling of secondary school students was employed in this study. For that purpose, twenty-nine (N=29) healthy adolescents (15-17 years old) from the city of Niš, Serbia voluntarily participated in the study. PA levels derived from the Serbian long version self-administered IPAQ were compared with pedometer-recorded data of step counts. PA was expressed as a metabolic equivalent-minute per week (MET-min/week) and classified as light, moderate, and vigorous. Then, the participants were asked to register pedometer-based step counts for seven consecutive days. Significant correlations were found between the IPAQ and the pedometer in all components, except light PA. Pedometer-based PA was strongly correlated with moderate and vigorous activity (r = 0.746, p < 0.0001), as well as with overall PA (r = 0.998, p < 0.0001). Comparing the four domains of IPAQ determined PA (leisure time physical activity, domestic and gardening activities, school-related physical activity and transport-related physical activity) and pedometry-based PA, significant correlations were found for three domains (p < 0.0001), excluding transport. The findings of this study provided support for the validity of the Serbian version of the IPAQ as an instrument for the assessment of habitual PA among adolescents.


physical activity, adolescents, IPAQ, pedometer

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