title: Correlates of Moderate-to-Vigorous Physical Activity in Brazilian Children.
abstract: Few studies have used ecological models to study multiple levels of association with objectively measured moderate-to-vigorous physical activity (MVPA) in young children from middle-income countries. The purpose of this study was to examine potential correlates of objectively measured MVPA in Brazilian children.
  
  
  
  The sample consisted of 328 children. An Actigraph GT3X+ accelerometer was used to monitor MVPA over 7 days. Body mass index and body fat percentage were measured using a bioelectrical impedance scale. Questionnaires completed by the children, their parents, and school personnel queried individual, family and home, and school-level environmental correlates.
  
  
  
  Children averaged 59.3 min/d in MVPA (44.5% met MVPA guidelines), and 51.8% were overweight/obese. For boys and girls combined, significant correlates (P < .05) of MVPA were waist circumference (β = -.007), travel mode to school (β = .140), maternal employment status (β = -.119) and TV in bedroom (β -.107). In boys, significant correlates of MVPA were waist circumference (β = -.011), travel mode to school (β = .133), and maternal employment status (β = -.195). In girls, the only significant correlate of MVPA was travel mode to school (β = .143).
  
  
  
  Several factors were identified as correlates of MVPA in Brazilian children; however, only travel mode to school was common for both boys and girls.
authors.forename: Gerson Luis de Moraes
authors.initials: GL
authors.lastname: Ferrari
authors.forename: Victor
authors.initials: V
authors.lastname: Matsudo
authors.forename: Tiago V
authors.initials: TV
authors.lastname: Barreira
authors.forename: Catrine
authors.initials: C
authors.lastname: Tudor-Locke
authors.forename: Peter T
authors.initials: PT
authors.lastname: Katzmarzyk
authors.forename: Mauro
authors.initials: M
authors.lastname: Fisberg
mesh_terms: D000273:Adipose Tissue / Q000502:physiology; D015992:Body Mass Index; D001938:Brazil; D002648:Child; D015444:Exercise / Q000502:physiology*; D005260:Female; D015438:Health Behavior / Q000502:physiology; D006801:Humans; D008019:Life Style; D008297:Male; D050177:Overweight / Q000209:etiology; D012044:Regression Analysis; D012307:Risk Factors; D012574:Schools / Q000706:statistics & numerical data; D057185:Sedentary Behavior; D011795:Surveys and Questionnaires; D055105:Waist Circumference / Q000502:physiology
keywords: accelerometer; health; pediatric; schoolchildren