title: Physical Activity and Sedentary Behavior Associated with Components of Metabolic Syndrome among People in Rural China.
abstract: BACKGROUND
  Metabolic syndrome is prevalent worldwide and its prevalence is related to physical activity, race, and lifestyle. Little data is available for people living in rural areas of China. In this study we examined associations of physical activity and sedentary behaviors with metabolic syndrome components among people in rural China.
  
  
  METHODS
  The Nantong Metabolic Syndrome Study recruited 13,505 female and 6,997 male participants between 2007 and 2008. Data of socio-demographic characteristics and lifestyle were collected. The associations of physical activity and sedentary behaviors with metabolic syndrome components were analyzed.
  
  
  RESULTS
  Prevalence of metabolic syndrome was 21.6%. It was significantly lower in men than in women. Low risks of metabolic syndrome were observed in those who did less sitting and engaged in more vigorous physical activity. The highest tertile of vigorous physical activity was associated with 15-40% decreased odds of metabolic syndrome and all of its components, except for low high-density lipoprotein cholesterol in men. Women with the highest tertile of moderate physical activity had 15-30% lower odds of central obesity, high glucose, and high triglycerides compared with those in the lowest tertile. Sitting time >42 hours per week had a 4%-12% attributable risk of metabolic syndrome, central obesity, and high triglycerides in both genders, and abnormal glucose and diastolic blood pressure in women. Sleeping for more than 8 hours per day was associated with risk of high serum glucose and lipids.
  
  
  CONCLUSIONS
  Our data suggested that physical activity has a preventive effect against metabolic syndrome and all its abnormal components, and that longer sitting time and sleep duration are associated with an increased risk of metabolic syndrome components, including central obesity and high triglycerides, glucose, and diastolic blood pressure. This study could provide information for future investigation into these associations. Also, recommendations are developed to reduce prevalence of metabolic syndrome and its components in rural Chinese populations.
authors.affiliation: Department of Epidemiology and Medical Statistics, School of Public Health, Nantong University, Nantong, Jiangsu, 226019, China.
authors.forename: Jing
authors.initials: J
authors.lastname: Xiao
authors.affiliation: Department of Epidemiology, School of Public Health, Nanjing Medical University, Nanjing, Jiangsu, 210029, China.
authors.forename: Chong
authors.initials: C
authors.lastname: Shen
authors.affiliation: Department of Epidemiology and Medical Statistics, School of Public Health, Nantong University, Nantong, Jiangsu, 226019, China.
authors.forename: Min J
authors.initials: MJ
authors.lastname: Chu
authors.affiliation: Department of Epidemiology and Medical Statistics, School of Public Health, Nantong University, Nantong, Jiangsu, 226019, China.
authors.forename: Yue X
authors.initials: YX
authors.lastname: Gao
authors.affiliation: Department of Epidemiology and Medical Statistics, School of Public Health, Nantong University, Nantong, Jiangsu, 226019, China.
authors.forename: Guang F
authors.initials: GF
authors.lastname: Xu
authors.affiliation: Department of Chronic Disease and Prevention, Center for Disease Control and Prevention of Nantong, Nantong, Jiangsu, 226007, China.
authors.forename: Jian P
authors.initials: JP
authors.lastname: Huang
authors.affiliation: Department of Epidemiology and Medical Statistics, School of Public Health, Nantong University, Nantong, Jiangsu, 226019, China.
authors.forename: Qiong Q
authors.initials: QQ
authors.lastname: Xu
authors.affiliation: Department of Epidemiology and Medical Statistics, School of Public Health, Nantong University, Nantong, Jiangsu, 226019, China.
authors.forename: Hui
authors.initials: H
authors.lastname: Cai
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D001786:Blood Glucose / Q000378:metabolism; D001794:Blood Pressure; D002681:China / Q000453:epidemiology; D008076:Cholesterol, HDL / Q000097:blood; D005260:Female; D006801:Humans; D008297:Male; D024821:Metabolic Syndrome / Q000097:blood / Q000453:epidemiology / Q000503:physiopathology; D008875:Middle Aged; D009043:Motor Activity; D056128:Obesity, Abdominal / Q000097:blood / Q000453:epidemiology / Q000503:physiopathology; D012424:Rural Population; D057185:Sedentary Behavior; D014280:Triglycerides / Q000097:blood
chemical_list: D001786:Blood Glucose; D008076:Cholesterol, HDL; D014280:Triglycerides