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A school-based exercise intervention program increases muscle strength in prepubertal boys.

Stenevi Lundgren, Susanna LU ; Daly, Robin M and Karlsson, Magnus LU (2010) In International Journal of Pediatrics 2010.
Abstract
This prospective controlled intervention study over 12 months evaluated the effect of exercise on muscular function, physical ability, and body composition in pre-pubertal boys. Sixty-eight boys aged 6-8 years, involved in a general school-based exercise program of 40 min per school day (200 min/week), were compared with 46 age-matched boys who participated in the general Swedish physical education curriculum of mean 60 min/week. Baseline and annual changes of body composition were measured by dual energy X-ray absorptiometry (DXA), stature, and body mass by standard equipments, isokinetic peak torque (PT) of the knee extensors, and flexors at 60 and 180 deg/sec by computerized dynamometer (Biodex) and vertical jump height (VJH) by a... (More)
This prospective controlled intervention study over 12 months evaluated the effect of exercise on muscular function, physical ability, and body composition in pre-pubertal boys. Sixty-eight boys aged 6-8 years, involved in a general school-based exercise program of 40 min per school day (200 min/week), were compared with 46 age-matched boys who participated in the general Swedish physical education curriculum of mean 60 min/week. Baseline and annual changes of body composition were measured by dual energy X-ray absorptiometry (DXA), stature, and body mass by standard equipments, isokinetic peak torque (PT) of the knee extensors, and flexors at 60 and 180 deg/sec by computerized dynamometer (Biodex) and vertical jump height (VJH) by a computerized electronic mat. The annual gain in stature and body mass was similar between the groups whereas the increase in total body and regional lean mass (P < .001) and fat mass (P < .001) was greater in the exercise group. The one-year gain in body mass-adjusted knee extensor and flexor PT at 180 deg/sec was significantly greater in the intervention group compared with the control group (P < .01, adjusted for age at baseline and P < .001, adjusted for age and muscle strength at baseline, resp.). There was no group difference in VJH. In conclusion, the increase in school-based physical education from 60 to 200 minutes per week enhances the development of lean body mass and muscle strength in pre-pubertal boys. (Less)
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author
organization
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type
Contribution to journal
publication status
published
subject
in
International Journal of Pediatrics
volume
2010
external identifiers
  • pmid:20652076
ISSN
1687-9759
DOI
10.1155/2010/307063
language
English
LU publication?
yes
id
1dc36577-1fb1-4725-8ef0-67ebf0507af9 (old id 1644620)
alternative location
http://www.ncbi.nlm.nih.gov/pubmed/20652076?dopt=Abstract
date added to LUP
2010-08-05 09:52:56
date last changed
2018-05-29 11:00:23
@article{1dc36577-1fb1-4725-8ef0-67ebf0507af9,
  abstract     = {This prospective controlled intervention study over 12 months evaluated the effect of exercise on muscular function, physical ability, and body composition in pre-pubertal boys. Sixty-eight boys aged 6-8 years, involved in a general school-based exercise program of 40 min per school day (200 min/week), were compared with 46 age-matched boys who participated in the general Swedish physical education curriculum of mean 60 min/week. Baseline and annual changes of body composition were measured by dual energy X-ray absorptiometry (DXA), stature, and body mass by standard equipments, isokinetic peak torque (PT) of the knee extensors, and flexors at 60 and 180 deg/sec by computerized dynamometer (Biodex) and vertical jump height (VJH) by a computerized electronic mat. The annual gain in stature and body mass was similar between the groups whereas the increase in total body and regional lean mass (P &lt; .001) and fat mass (P &lt; .001) was greater in the exercise group. The one-year gain in body mass-adjusted knee extensor and flexor PT at 180 deg/sec was significantly greater in the intervention group compared with the control group (P &lt; .01, adjusted for age at baseline and P &lt; .001, adjusted for age and muscle strength at baseline, resp.). There was no group difference in VJH. In conclusion, the increase in school-based physical education from 60 to 200 minutes per week enhances the development of lean body mass and muscle strength in pre-pubertal boys.},
  articleno    = {307063},
  author       = {Stenevi Lundgren, Susanna and Daly, Robin M and Karlsson, Magnus},
  issn         = {1687-9759},
  language     = {eng},
  series       = {International Journal of Pediatrics},
  title        = {A school-based exercise intervention program increases muscle strength in prepubertal boys.},
  url          = {http://dx.doi.org/10.1155/2010/307063},
  volume       = {2010},
  year         = {2010},
}