title: Cardiorespiratory fitness and body mass index values in 9-year-old rural Norwegian children.
abstract: OBJECTIVE
  To describe cardiorespiratory fitness and body mass index (BMI) values in a representative population of 9-year-old Norwegian children in two rural communities and compare present values with previous findings.
  
  
  METHODS
  Two hundred and fifty-nine 9-year-old children were invited, and 256 participated in this study. Maximal oxygen uptake was directly measured during a continuous progressive treadmill protocol. Body mass and height were also measured.
  
  
  RESULTS
  The mean +/- SD relative maximal oxygen uptake was 52.8 +/- 6.5 for boys and 46.9 +/- 7.2 mL/kg/min for girls. Eight percent of the boys and 16.8% of the girls were classified as overweight, and 1.6% of the boys and 6.9% of the girls as obese. Mean age, body mass, height and Ponderal index were not significantly different between sexes. Girls had a higher BMI than boys (p = 0.05).
  
  
  CONCLUSIONS
  Compared to earlier Norwegian studies, children's BMI values seem to have increased substantially. This increase is most pronounced in girls. When assessing these differences using the PI, this increase is less marked. Comparing maximal oxygen uptake data with that in earlier Nordic studies, there is no evidence that fitness has declined among 9-year olds. However, the limitations of the few earlier studies make reliable comparisons difficult.
authors.affiliation: Sogn og Fjordane University College, Faculty of Teacher Education and Sport, Sogndal, Norway. geirkr@hisf.no
authors.forename: G K
authors.initials: GK
authors.lastname: Resaland
authors.forename: A
authors.initials: A
authors.lastname: Mamen
authors.forename: S A
authors.initials: SA
authors.lastname: Anderssen
authors.forename: L B
authors.initials: LB
authors.lastname: Andersen
mesh_terms: D015992:Body Mass Index; D002320:Cardiovascular Physiological Phenomena; D002648:Child; D005080:Exercise Test; D005260:Female; D006801:Humans; D008297:Male; D009664:Norway / Q000453:epidemiology; D009765:Obesity / Q000453:epidemiology / Q000503:physiopathology; D050177:Overweight / Q000453:epidemiology / Q000503:physiopathology; D010100:Oxygen / Q000378:metabolism; D010809:Physical Fitness / Q000502:physiology*; D012129:Respiratory Function Tests; D012143:Respiratory Physiological Phenomena; D012307:Risk Factors; D012423:Rural Health; D017678:Sex Distribution
chemical_list: D010100:Oxygen