Background: The highest prevalence of childhood obesity has been observed in developed countries. However, its prevalence is increasing in developing countries as well.Objectives: To evaluate demographic variation in the prevalence of obesity among 1361 children and adolescents of three Libyan cities Tripoli, Zawia, and Geryan (Tripoli– girls; n = 369, boys; n = 290, Zawia– girls; n = 250, boys; n = 89, and Geryan– girls; n = 230, boys; n = 133) aged 3–19 years.Methods: The study was carried out at Central Tripoli Pediatric Hospital during a year 2016/17.The researcher took the anthropometric measurements into the nurse’s room of the out-patient de-partment (OPD) and gave a questionnaire to children to be answered by one of the child’s parents. The question naire included questions related to the socioeconomic status, lifestyle (physical activity and eating habits) and family history of overweight and obesity.In this paper, a Chi-square test of independence is used to measures whether there is a relationship between gender and physical activity.The results show that there is a significant relationship between the physical activity and the gender for all three cities.

Faculty of Sports Studies Masaryk University

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