Introduction In the past few decades, the global prevalence of obesity among children and adolescents has significantly increased, with an increasing trend in both developed and developing countries. 1 , 2 Research shows that the global prevalence of obesity among children and adolescents ages 5–19 y has increased from 0.7% in 1975 to 5.6% in 2016 and from 0.9% in 1975 to 7.8% in 2016, respectively. 3 According to World Health Organization (WHO) estimates, by 2025 there will be >70 million overweight or obese children worldwide.
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Study on the influence of levels of physical activity and socio-economic conditions on body mass index of adolescents.
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