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A school-curriculum-based exercise intervention program for two years in pre-pubertal girls does not influence hip structure.

Alwis, Gayani LU ; Lindén, Christian LU ; Stenevi Lundgren, Susanna LU ; Ahlborg, Henrik LU ; Dencker, Magnus LU ; Besjakov, Jack LU ; Gardsell, Per and Karlsson, Magnus LU (2008) In Dynamic Medicine 7. p.8-8
Abstract
ABSTRACT: BACKGROUND: It is known that physical activity during growth has a positive influence on bone mineral accrual, and is thus possibly one strategy to prevent osteoporosis. However, as bone geometry, independent of areal bone mineral density (aBMD), influences fracture risk, this study aimed to evaluate whether hip structure in pre-pubertal girls is also affected by a two-year exercise intervention program. METHODS: Forty-two girls aged 7-9 years in a school-curriculum-based exercise intervention program comprising 40 minutes of general physical activity per school day (200 minutes per week) were compared with 43 age-matched girls who participated in the general Swedish physical education curriculum comprising a mean of 60 minutes... (More)
ABSTRACT: BACKGROUND: It is known that physical activity during growth has a positive influence on bone mineral accrual, and is thus possibly one strategy to prevent osteoporosis. However, as bone geometry, independent of areal bone mineral density (aBMD), influences fracture risk, this study aimed to evaluate whether hip structure in pre-pubertal girls is also affected by a two-year exercise intervention program. METHODS: Forty-two girls aged 7-9 years in a school-curriculum-based exercise intervention program comprising 40 minutes of general physical activity per school day (200 minutes per week) were compared with 43 age-matched girls who participated in the general Swedish physical education curriculum comprising a mean of 60 minutes per week. The hip was scanned by dual energy X-ray absorptiometry (DXA) and the hip structural analysis (HSA) software was applied to evaluate bone mineral content (BMC, g), areal bone mineral density (aBMD, g/cm2), periosteal diameter, cross-sectional area (CSA, cm2), section modulus (Z, cm3) and cross-sectional moment of inertia (CSMI, cm4) of the femoral neck (FN). Annual changes were compared. Subjective duration of physical activity was estimated by questionnaire and objective level of everyday physical activity at follow-up by means of accelerometers worn for four consecutive days. All children remained at Tanner stage 1 throughout the study. Group comparisons were made by independent student's t-test between means and analyses of covariance (ANCOVA). RESULTS: At baseline, the two groups did not differ with regard to age, anthropometrics or bone parameters. No between-group differences were observed for annual changes in the FN variables measured. CONCLUSION: A two-year school-based moderately intense general exercise program for 7-9-year-old pre-pubertal girls does not influence structural changes in the FN. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Dynamic Medicine
volume
7
pages
8 - 8
publisher
BioMed Central
external identifiers
  • pmid:18442381
  • scopus:44349171719
ISSN
1476-5918
DOI
10.1186/1476-5918-7-8
language
English
LU publication?
yes
id
d48603a6-fb6d-41dc-8f47-e0a948237ce4 (old id 1154711)
alternative location
http://www.ncbi.nlm.nih.gov/pubmed/18442381?dopt=Abstract
date added to LUP
2008-06-04 14:52:29
date last changed
2017-01-01 07:54:22
@article{d48603a6-fb6d-41dc-8f47-e0a948237ce4,
  abstract     = {ABSTRACT: BACKGROUND: It is known that physical activity during growth has a positive influence on bone mineral accrual, and is thus possibly one strategy to prevent osteoporosis. However, as bone geometry, independent of areal bone mineral density (aBMD), influences fracture risk, this study aimed to evaluate whether hip structure in pre-pubertal girls is also affected by a two-year exercise intervention program. METHODS: Forty-two girls aged 7-9 years in a school-curriculum-based exercise intervention program comprising 40 minutes of general physical activity per school day (200 minutes per week) were compared with 43 age-matched girls who participated in the general Swedish physical education curriculum comprising a mean of 60 minutes per week. The hip was scanned by dual energy X-ray absorptiometry (DXA) and the hip structural analysis (HSA) software was applied to evaluate bone mineral content (BMC, g), areal bone mineral density (aBMD, g/cm2), periosteal diameter, cross-sectional area (CSA, cm2), section modulus (Z, cm3) and cross-sectional moment of inertia (CSMI, cm4) of the femoral neck (FN). Annual changes were compared. Subjective duration of physical activity was estimated by questionnaire and objective level of everyday physical activity at follow-up by means of accelerometers worn for four consecutive days. All children remained at Tanner stage 1 throughout the study. Group comparisons were made by independent student's t-test between means and analyses of covariance (ANCOVA). RESULTS: At baseline, the two groups did not differ with regard to age, anthropometrics or bone parameters. No between-group differences were observed for annual changes in the FN variables measured. CONCLUSION: A two-year school-based moderately intense general exercise program for 7-9-year-old pre-pubertal girls does not influence structural changes in the FN.},
  author       = {Alwis, Gayani and Lindén, Christian and Stenevi Lundgren, Susanna and Ahlborg, Henrik and Dencker, Magnus and Besjakov, Jack and Gardsell, Per and Karlsson, Magnus},
  issn         = {1476-5918},
  language     = {eng},
  pages        = {8--8},
  publisher    = {BioMed Central},
  series       = {Dynamic Medicine},
  title        = {A school-curriculum-based exercise intervention program for two years in pre-pubertal girls does not influence hip structure.},
  url          = {http://dx.doi.org/10.1186/1476-5918-7-8},
  volume       = {7},
  year         = {2008},
}