Cardiorespiratory fitness and body mass index values in 9-year-old rural Norwegian children
Article first published online: 7 JAN 2009
©2008 The Author(s)/Journal Compilation ©2008 Foundation Acta Pædiatrica/Acta Pædiatrica
Volume 98, Issue 4, pages 687–692, April 2009
How to Cite
Resaland, G., Mamen, A., Anderssen, S. and Andersen, L. (2009), Cardiorespiratory fitness and body mass index values in 9-year-old rural Norwegian children. Acta Paediatrica, 98: 687–692. doi: 10.1111/j.1651-2227.2008.01181.x
- Issue published online: 6 MAR 2009
- Article first published online: 7 JAN 2009
- Received 27 March 2008; revised 27 October 2008; accepted 27 November 2008.
- Peak VO2
Aim: 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).
Conclusion: 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.