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Gender differences and determinants of aerobic fitness in children aged 8-11 years.

Dencker, Magnus LU ; Thorsson, Ola LU ; Karlsson, Magnus; Lindén, Christian LU ; Eiberg, Stig; Wollmer, Per LU and Andersen, Lars (2007) In European Journal of Applied Physiology 99. p.19-26
Abstract
Previous studies of gender differences in maximum oxygen uptake have come to different conclusions. Limited data exists where the determinants of maximum oxygen uptake have been evaluated in a comprehensive manner. Thus, we examined 248 children (140 boys and 108 girls), aged 7.9-11.1 years. Body composition was determined by dual-energy X-ray absorptiometry, measured variables were total body fat (TBF) and lean body mass (LBM). Maximal oxygen uptake (VO2peak) was measured by indirect calorimetry during a maximal cycle exercise test. Daily physical activity was assessed by accelerometers and duration of vigorous activity per day (VPA) was calculated. Left ventricular inner diastolic diameter (LVDD) was measured by echocardiography. Lung... (More)
Previous studies of gender differences in maximum oxygen uptake have come to different conclusions. Limited data exists where the determinants of maximum oxygen uptake have been evaluated in a comprehensive manner. Thus, we examined 248 children (140 boys and 108 girls), aged 7.9-11.1 years. Body composition was determined by dual-energy X-ray absorptiometry, measured variables were total body fat (TBF) and lean body mass (LBM). Maximal oxygen uptake (VO2peak) was measured by indirect calorimetry during a maximal cycle exercise test. Daily physical activity was assessed by accelerometers and duration of vigorous activity per day (VPA) was calculated. Left ventricular inner diastolic diameter (LVDD) was measured by echocardiography. Lung function was evaluated with spirometric testing and whole body plethysmography. Boys had between 8 and 18% higher values than girls for VO2peak, dependent upon whether VO2peak was expressed in absolute values or scaled to body mass, LBM or if allometric scaling was used. In multiple regression analysis absolute values of aerobic fitness were independently related to LBM, maximal heart rate (Max HR), gender, LVDD, and VPA. Furthermore, when VO2peak was scaled to body mass it was independently related to In TBF, Max HR, gender, VPA, and LVDD. Lung function had no relation to VO2peak. Our study concludes that body composition is the main predictor for VO2peak, in children aged 8-11 years, whereas VPA or LVDD has only a modest impact. Existing gender differences in VO2peak cannot be explained only by differences in body composition, physical activity, or heart size. (Less)
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author
organization
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type
Contribution to journal
publication status
published
subject
keywords
maximum oxygen uptake, dual-energy X-ray, absorptiometry, echocardiography, children, accelerometers
in
European Journal of Applied Physiology
volume
99
pages
19 - 26
publisher
Springer
external identifiers
  • wos:000243260200003
  • scopus:33751251060
ISSN
1439-6327
DOI
10.1007/s00421-006-0310-x
language
English
LU publication?
yes
id
a59a3775-0cdf-4ebf-abd7-9978bbcf91d6 (old id 162426)
alternative location
http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=17024465&dopt=Abstract
date added to LUP
2007-07-17 14:24:34
date last changed
2017-06-25 03:31:48
@article{a59a3775-0cdf-4ebf-abd7-9978bbcf91d6,
  abstract     = {Previous studies of gender differences in maximum oxygen uptake have come to different conclusions. Limited data exists where the determinants of maximum oxygen uptake have been evaluated in a comprehensive manner. Thus, we examined 248 children (140 boys and 108 girls), aged 7.9-11.1 years. Body composition was determined by dual-energy X-ray absorptiometry, measured variables were total body fat (TBF) and lean body mass (LBM). Maximal oxygen uptake (VO2peak) was measured by indirect calorimetry during a maximal cycle exercise test. Daily physical activity was assessed by accelerometers and duration of vigorous activity per day (VPA) was calculated. Left ventricular inner diastolic diameter (LVDD) was measured by echocardiography. Lung function was evaluated with spirometric testing and whole body plethysmography. Boys had between 8 and 18% higher values than girls for VO2peak, dependent upon whether VO2peak was expressed in absolute values or scaled to body mass, LBM or if allometric scaling was used. In multiple regression analysis absolute values of aerobic fitness were independently related to LBM, maximal heart rate (Max HR), gender, LVDD, and VPA. Furthermore, when VO2peak was scaled to body mass it was independently related to In TBF, Max HR, gender, VPA, and LVDD. Lung function had no relation to VO2peak. Our study concludes that body composition is the main predictor for VO2peak, in children aged 8-11 years, whereas VPA or LVDD has only a modest impact. Existing gender differences in VO2peak cannot be explained only by differences in body composition, physical activity, or heart size.},
  author       = {Dencker, Magnus and Thorsson, Ola and Karlsson, Magnus and Lindén, Christian and Eiberg, Stig and Wollmer, Per and Andersen, Lars},
  issn         = {1439-6327},
  keyword      = {maximum oxygen uptake,dual-energy X-ray,absorptiometry,echocardiography,children,accelerometers},
  language     = {eng},
  pages        = {19--26},
  publisher    = {Springer},
  series       = {European Journal of Applied Physiology},
  title        = {Gender differences and determinants of aerobic fitness in children aged 8-11 years.},
  url          = {http://dx.doi.org/10.1007/s00421-006-0310-x},
  volume       = {99},
  year         = {2007},
}