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Nutrients 2016, 8(11), 667; doi:10.3390/nu8110667

Sedentary Behavior Is Independently Related to Fat Mass among Children and Adolescents in South China

Department of Nutrition, Food Safety and Toxicology, West China School of Public Health, Sichuan University, Chengdu 610041, China
Department of Clinical Nutrition, Jincheng People’s Hospital, Jincheng 048026, China
Office of Scientific Research Management, West China School of Public Health, Sichuan University, Chengdu 610041, China
West China Research Center for Rural Health Development, Sichuan University Huaxi Medical Center, Chengdu 610041, China
Department of Child and Adolescent Psychiatry, University Hospital Essen, University of Duisburg-Essen, Essen, Duisburg 47057, Germany
Department of Pediatrics, Research Institute for the Prevention of Allergies and Respiratory Diseases in Childhood, Marien-Hospital Wesel, Wesel 46483, Germany
Berlin School of Public Health, Charité—Universitätsmedizin, Berlin 10117, Germany
Author to whom correspondence should be addressed.
Received: 31 August 2016 / Revised: 12 October 2016 / Accepted: 17 October 2016 / Published: 25 October 2016
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We aim to explore the independent associations of sedentary behaviors (SB) with body mass distribution among Chinese children. Data on the screen-based sedentary time (television viewing and computer use) and doing homework, physical activities and dietary intake of 1586 Chinese children (50.3% girls) aged 7–15 years were obtained through validated questionnaires. Skin-fold thickness, body height, and weight were measured to calculate percent body fat (%BF), fat mass index (FMI), and fat-free mass index (FFMI). Parental characteristics were collected by questionnaires. Among girls, time of SB (screen time or doing homework) was positively related to %BF, FMI, and FFMI (p < 0.03) after adjusting for maternal overweight, the average annual income of family, moderate-to-vigorous physical activity energy expenditure, and energy intake: Girls in the highest tertile of screen time/homework had 16.7%/23.3% higher relative FMI and 2.9%/2.9% higher relative FFMI than girls in the lowest tertile. Among boys, screen time was positively associated with FFMI (p < 0.003), but not related to %BF and FMI (p > 0.09), while time of doing homework was positively related to %BF and FMI (p = 0.03). Sedentary behaviors might be positively and independently related to fat mass among Chinese children, and were more pronounced in girls. View Full-Text
Keywords: sedentary time; physical activity; body fat; energy intake sedentary time; physical activity; body fat; energy intake

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Xue, H.; Tian, G.; Duan, R.; Quan, L.; Zhao, L.; Yang, M.; Libuda, L.; Muckelbauer, R.; Cheng, G. Sedentary Behavior Is Independently Related to Fat Mass among Children and Adolescents in South China. Nutrients 2016, 8, 667.

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