Physical activity and obesity in Lebanese adolescents : prevalences, measurements and associations

Abstract : Obesity is a pathological excess of body fat. An environment with boundless food availability, and an increasingly sedentary lifestyle coupled with less chances for PA creates the perfect setting for obesity. Previous studies in Lebanon show that prevalence of obesity in adults is significant. Suggested causes include low physical activity, inactive lifestyle, and nutritional intake. However, in adolescents, research shows that prevalence is low among girls as compared to boys, and as compared to girls in other countries. The first aim was to assess the prevalence of overweight and obesity among Lebanese adolescents and to examine correlates of physical activity, inactivity, and quality of life with BMI status. The second aim was to determine the relation between Body Mass Index and percent body fat among girls and to investigate the effect of physical activity on this relation. The work in this thesis was conducted across two phases. In phase one, 1000 participated. They completed a self-report questionnaire made up of several sections. Data from this phase was used in study 1. In phase two, 65 adolescent girls were recruited. Body weight and height were measured by standard anthropometric procedures. DXA whole body scans were performed and subjects completed a physical activity questionnaire. Data from this phase was used in study 2 and 3. In Study one, based on international BMI cut off points, the prevalence of overweight and obesity is 22.5% and 7.8% in boys respectively, and 12.47% and 1.78% in girls respectively. Boys are more active than girls. Obesity in adolescence impairs quality of life and is more pronounced in girls. Study two shows that girls demonstrate a higher body fat for a given BMI, based on this, the current prevalence of overweight and obesity is underestimated. Finally, study three suggests that by adding a simple validated self report questionnaire for physical activity, it may be possible to improve the relation between BMI and %BF
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Tissues and Organs [q-bio.TO]. Université Rennes 2; Université Européenne de Bretagne; University of Balamand (Liban), 2010. English. <NNT : 2010REN20062>


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Submitted on : Friday, May 27, 2011 - 3:38:13 PM
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Abdallah Fazah. Physical activity and obesity in Lebanese adolescents : prevalences, measurements and associations. Tissues and Organs [q-bio.TO]. Université Rennes 2; Université Européenne de Bretagne; University of Balamand (Liban), 2010. English. <NNT : 2010REN20062>. <tel-00596383>

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