title: [The relationship between physical activity and clustering of metabolic abnormalities in children].
abstract: OBJECTIVE
  This study was performed to assess the association between physical activity and the clustering of metabolic abnormalities among Korean children. The effect of substituting moderate to vigorous physical activity for the time spent in inactivity was examined as well.
  
  
  METHODS
  The study subjects were comprised of 692 (354 boys, 338 girls) 4th grade elementary school students. We used a modified form of the physical activity questionnaire that was developed in the Five-City Project. The subjects with clustering of metabolic abnormalities were defined as having two or more of the following five characteristics: waist circumference > or =90 %, systolic or diastolic blood pressure > or =90 %, fasting glucose > or =110 mg/dl, triglycerides > or =110 mg/dl and HDL cholesterol < or =40 mg/dl. We calculated the odds ratios to assess the effect of substituting moderate to vigorous physical activity for time spent in inactivity.
  
  
  RESULTS
  The risk of clustered metabolic abnormalities was inversely correlated with the increased time spent on moderate to vigorous physical activity, but the correlation was not significant. The odds ratio for clustering of metabolic abnormalities that represented the effect of substituting moderate to vigorous physical activity for 30 minutes of sedentary activity was 0.87 (95% CI=0.76-1.01).
  
  
  CONCLUSIONS
  These findings suggest that substituting moderate to vigorous physical activity for sedentary activity could decrease the risk of clustered metabolic abnormalities.
authors.affiliation: Department of Preventive Medicine, Hanyang University College of Medicine.
authors.forename: Hyun Jin
authors.initials: HJ
authors.lastname: Son
authors.forename: Mi Kyung
authors.initials: MK
authors.lastname: Kim
authors.forename: Hyun Ja
authors.initials: HJ
authors.lastname: Kim
authors.forename: Ho
authors.initials: H
authors.lastname: Kim
authors.forename: Bo Youl
authors.initials: BY
authors.lastname: Choi
mesh_terms: D001786:Blood Glucose / Q000378:metabolism; D001794:Blood Pressure; D002648:Child; D008076:Cholesterol, HDL; D015444:Exercise; D005260:Female; D006801:Humans; D008297:Male; D024821:Metabolic Syndrome / Q000175:diagnosis / Q000453:epidemiology*; D012307:Risk Factors; D011795:Surveys and Questionnaires; D014280:Triglycerides / Q000097:blood; D014505:Urban Population; D055105:Waist Circumference
chemical_list: D001786:Blood Glucose; D008076:Cholesterol, HDL; D014280:Triglycerides