title: Physical activity, sedentary behavior, and the metabolic syndrome in minority youth.
abstract: OBJECTIVE
  This study aimed to determine the associations among physical activity, sedentary behavior, and the metabolic syndrome (MetS) in Latino and African American youth using both subjective and objective measures of activity levels.
  
  
  METHODS
  Cross-sectional data from 105 participants from three pediatric obesity studies that share a core set of methods and measures (Latino 74%, female 75%, mean age = 13 ± 3 yr) were used. Measures included moderate-to-vigorous physical activity and sedentary behavior by accelerometry and 3-Day Physical Activity Recall (3DPAR), fat and lean tissue mass by BodPod™, fasting glucose, lipids, blood pressure, and waist circumference. Associations between physical activity, sedentary behavior, and MetS were examined using ANCOVA, Pearson correlations, partial correlations, and logistic regressions with adjustments for age, sex, ethnicity, fat and lean mass, and pubertal Tanner stage.
  
  
  RESULTS
  Accelerometry data showed that greater time engaging in moderate-to-vigorous physical activity was related to lower odds of the MetS (odds ratio = 0.49, 95% confidence interval = 0.25-0.98), independent of sedentary behavior and covariates, and inversely correlated with fasting glucose (r = -0.21, P = 0.03) and systolic blood pressure (r = -0.25, P = 0.01), adjusting for covariates. Data from the 3DPAR showed that higher levels of sedentary behavior were related to higher odds of the MetS (odds ratio = 4.44, 95% confidence interval = 1.33-14.79), independent of moderate-to-vigorous physical activity and covariates, negatively correlated with HDL-cholesterol (r = -0.21, P = 0.04) and positively correlated systolic blood pressure (r = 0.26, P = 0.009), adjusting for covariates.
  
  
  CONCLUSIONS
  Future interventions aiming to improve metabolic health in youth should target both the promotion of physical activity and the reduction of sedentary behavior. Subjective and objective measures should be used in conjunction to better capture activity behaviors.
authors.affiliation: Department of Preventive Medicine, Keck School of Medicine, University of Southern California, Los Angeles, CA 91803, USA.
authors.forename: Ya-Wen
authors.initials: YW
authors.lastname: Hsu
authors.forename: Britni R
authors.initials: BR
authors.lastname: Belcher
authors.forename: Emily E
authors.initials: EE
authors.lastname: Ventura
authors.forename: Courtney E
authors.initials: CE
authors.lastname: Byrd-Williams
authors.forename: Marc J
authors.initials: MJ
authors.lastname: Weigensberg
authors.forename: Jaimie N
authors.initials: JN
authors.lastname: Davis
authors.forename: Arianna D
authors.initials: AD
authors.lastname: McClain
authors.forename: Michael I
authors.initials: MI
authors.lastname: Goran
authors.forename: Donna
authors.initials: D
authors.lastname: Spruijt-Metz
mesh_terms: D000293:Adolescent; D001741:Black or African American; D001786:Blood Glucose / Q000502:physiology; D001794:Blood Pressure / Q000502:physiology; D001823:Body Composition; D002648:Child; D003430:Cross-Sectional Studies; D005260:Female; D006630:Hispanic or Latino; D006801:Humans; D008055:Lipids / Q000097:blood / Q000502:physiology; D008297:Male; D024821:Metabolic Syndrome / Q000453:epidemiology* / Q000208:ethnology / Q000209:etiology; D008913:Minority Groups / Q000706:statistics & numerical data*; D009043:Motor Activity / Q000502:physiology*; D009765:Obesity / Q000097:blood / Q000208:ethnology / Q000503:physiopathology; D057185:Sedentary Behavior / Q000208:ethnology*; D055105:Waist Circumference / Q000502:physiology
chemical_list: D001786:Blood Glucose; D008055:Lipids