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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

1
Department of Nutrition, Food Safety and Toxicology, West China School of Public Health, Sichuan University, Chengdu 610041, China
2
Department of Clinical Nutrition, Jincheng People’s Hospital, Jincheng 048026, China
3
Office of Scientific Research Management, West China School of Public Health, Sichuan University, Chengdu 610041, China
4
West China Research Center for Rural Health Development, Sichuan University Huaxi Medical Center, Chengdu 610041, China
5
Department of Child and Adolescent Psychiatry, University Hospital Essen, University of Duisburg-Essen, Essen, Duisburg 47057, Germany
6
Department of Pediatrics, Research Institute for the Prevention of Allergies and Respiratory Diseases in Childhood, Marien-Hospital Wesel, Wesel 46483, Germany
7
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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Abstract

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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MDPI and ACS Style

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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