title: The contribution of school breaks to the all-day physical activity of 9- and 10-year-old overweight and non-overweight children.
abstract: OBJECTIVE
  This study examines whether moderate-to-vigorous physical activity (MVPA), in at least 30-min school breaks (SB), helps to achieve the health-related amount of daily physical activity (PA) and whether these exercises influence after-school PA.
  
  
  METHODS
  The ActiTrainer-based PA was monitored over two school days in 239 children aged from 9 to 10 (57.3% female; 20.1% overweight, and 19.2% obese), in Katowice, in February 2010. PA was assessed based on steps, heart rate, and duration of PA.
  
  
  RESULTS
  MVPA, for 30 min during SB, represented an average of 1,258 steps for overweight girls and 1,620 steps for boys, and 1,336 steps for non-overweight girls and 1,758 steps for boys. Children with 30 min of MVPA during SB attained a higher daily amount of steps (p < 0.001) and duration of overall PA (p < 0.01), in comparison with less physically active children.
  
  
  CONCLUSIONS
  The daily 30 min of MVPA during SB amounts to 12.5% of the overall number of steps for girls and 16.3% for boys, thus contributing to higher school PA and overall PA and leading to the achievement of the health-related minimum of PA.
authors.affiliation: The Jerzy Kukuczka Academy of Physical Education, Katowice, Poland.
authors.forename: Dorota
authors.initials: D
authors.lastname: Groffik
authors.forename: Erik
authors.initials: E
authors.lastname: Sigmund
authors.forename: Karel
authors.initials: K
authors.lastname: Frömel
authors.forename: František
authors.initials: F
authors.lastname: Chmelík
authors.forename: Petra
authors.initials: P
authors.lastname: Nováková Lokvencová
mesh_terms: D002648:Child; D015444:Exercise / Q000502:physiology*; D005260:Female; D006339:Heart Rate / Q000502:physiology; D006801:Humans; D007899:Leisure Activities; D008297:Male; D050177:Overweight / Q000503:physiopathology*; D010806:Physical Education and Training; D011044:Poland; D012574:Schools; D013997:Time Factors