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标题：Underweight in 14 to 16 year-old girls and boys: prevalence and associations with physical activity and sedentary activities
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作者：Adam Kantanista ; Wiesław Osiński
期刊名称：Annals of Agricultural and Environmental Medicine
印刷版ISSN：1232-1966
电子版ISSN：1898-2263
出版年度：2014
卷号：21
期号：1
页码：114-119
出版社：Institute of Agricultural Medicine in Lublin
摘要：Introduction and objectives. Underweight is associated with increased mortality of adults when compared to normalweight or overweight individuals. Studies of associations between underweight and physical activity levels in adolescentsare sparse. The aim of this study was to determine the prevalence of underweight amongst 14 to 16 year-old girls and boysin tandem with the levels of physical activity and time spent in sedentary activities. The results were compared to thoseobserved in normal weight and overweight adolescents.Material and methods. This study included 1702 girls and 1547 boys aged from 14 to 16 years from twelve gymnasiumschools in Poznan (Poland). Based on BMI values, the participants were assigned to the following categories: a) underweight,b) normal weight, and c) overweight. The levels of physical activity, participation rates in physical education classes andthe time spent in sedentary activities were determined by means of questionnaire survey.Results. The fraction of underweight girls amounted to 11.6% and was similar to the percentage of obese girls (14.6%).The fraction of underweight boys was 7.0%, and was markedly lower than the percentage of overweight boys (17.0%).Underweight and overweight boys were characterized by significantly lower levels of physical activity compared to normalweight participants (p ≤.001). Both in girls and in boys, the prevalence of underweight and overweight was not significantlyassociated with the time spent in various sedentary activities.Conclusions. Underweight occurs in relatively high fraction of girls and boys. Underweight is associated with lower levels ofphysical activity in boys. The prevalence of underweight among adolescents is not associated with time spent in sedentaryactivities
关键词：underweight; physical activity; sedentary activities; adolescents