title: Sleep Duration and Media Time Have a Major Impact on Insulin Resistance and Metabolic Risk Factors in Obese Children and Adolescents.
abstract: Lifestyle factors sleep duration and media time during childhood differ between countries. This study examined whether sleep duration and media time affect metabolic risk factors insulin resistance (IR), blood lipid profile, and liver enzymes, and whether there is a relationship between sleep time and media time in Turkish obese children and adolescents.
  
  
  
  Subjects included 108 obese children and adolescents (aged 10-15 years) whose lifestyle factors were assessed using a survey containing questions about sleep durations, television viewing, media use, and demographic factors. Metabolic risk factors were compared among groups categorized according to sleep and media duration.
  
  
  
  Aspartate aminotransferase (AST), alanine aminotransferase (ALT), and triglyceride (TG) levels and homeostasis model assessment of insulin resistance (HOMA-IR) values were higher in subjects who spent >5 hours/day on media. Children 10-13 years old who slept <9 hours/day were more likely to have higher insulin and HOMA-IR (p < 0.05) levels and lower high-density lipoprotein cholesterol (HDL-C) levels compared with subjects who slept 9-10 hours/day and >10 hours/day. Correlation analysis revealed a negative relationship between sleep time and media time (r = -0.471, p = 0.000).
  
  
  
  Short sleep duration was associated with IR and an elevated plasma lipoprotein profile in children and adolescents. Our results suggest that insufficient sleep and excessive media exposure may contribute to metabolic risk in the context of obesity, and therefore, working to improve sleep duration and limit media time could help reduce metabolic risk in obese children and adolescents.
authors.affiliation: 1 Department of Nutrition and Dietetics, Faculty of Health Sciences, Necmettin Erbakan University , Konya, Turkey .
authors.forename: Fatma Kubra
authors.initials: FK
authors.lastname: Sayin
authors.affiliation: 2 Department of Paediatric Endocrinology, Konya Training and Research Hospital , Konya, Turkey .
authors.forename: Muammer
authors.initials: M
authors.lastname: Buyukinan
mesh_terms: D000293:Adolescent; D000410:Alanine Transaminase / Q000097:blood*; D001219:Aspartate Aminotransferases / Q000097:blood*; D015415:Biomarkers / Q000097:blood; D001786:Blood Glucose / Q000378:metabolism; D015992:Body Mass Index; D002648:Child; D008076:Cholesterol, HDL / Q000097:blood; D003201:Computers / Q000706:statistics & numerical data*; D005260:Female; D006706:Homeostasis; D006801:Humans; D007328:Insulin / Q000097:blood; D007333:Insulin Resistance; D008055:Lipids / Q000097:blood; D008297:Male; D024821:Metabolic Syndrome / Q000453:epidemiology / Q000209:etiology / Q000517:prevention & control; D065626:Non-alcoholic Fatty Liver Disease / Q000453:epidemiology / Q000209:etiology / Q000517:prevention & control; D063766:Pediatric Obesity / Q000097:blood / Q000150:complications / Q000453:epidemiology / Q000378:metabolism*; D012307:Risk Factors; D057185:Sedentary Behavior; D012890:Sleep / Q000502:physiology*; D013690:Television / Q000706:statistics & numerical data*; D013997:Time Factors; D014280:Triglycerides / Q000097:blood; D014421:Turkey / Q000453:epidemiology; D018910:Video Games
chemical_list: D015415:Biomarkers; D001786:Blood Glucose; D008076:Cholesterol, HDL; D007328:Insulin; D008055:Lipids; D014280:Triglycerides; D001219:Aspartate Aminotransferases; D000410:Alanine Transaminase