Influence of a school-based physical activity intervention on cortical bone mass distribution: A 7-year intervention study

Fritz, Jesper, Duckham, Rachel L., Rantalainen, Timo, Rosengren, Bjorn E., Karlsson, Magnus K. and Daly, Robin M. 2016, Influence of a school-based physical activity intervention on cortical bone mass distribution: A 7-year intervention study, Calcified tissue international, vol. 99, no. 5, pp. 443-453, doi: 10.1007/s00223-016-0174-y.

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Title Influence of a school-based physical activity intervention on cortical bone mass distribution: A 7-year intervention study
Author(s) Fritz, Jesper
Duckham, Rachel L.ORCID iD for Duckham, Rachel L.
Rantalainen, TimoORCID iD for Rantalainen, Timo
Rosengren, Bjorn E.
Karlsson, Magnus K.
Daly, Robin M.ORCID iD for Daly, Robin M.
Journal name Calcified tissue international
Volume number 99
Issue number 5
Start page 443
End page 453
Total pages 11
Publisher Springer
Place of publication Berlin, Germany
Publication date 2016-11
ISSN 1432-0827
Keyword(s) Bone distribution
Physical activity
Science & Technology
Life Sciences & Biomedicine
Endocrinology & Metabolism
Summary Cortical bone mass and density varies across a bones length and cross section, and may be influenced by physical activity. This study evaluated the long-term effects of a pediatric school-based physical activity intervention on tibial cortical bone mass distribution. A total of 170 children (72 girls and 98 boys) from one school were provided with 200 min of physical education per week. Three other schools (44 girls and 47 boys) continued with the standard 60 min per week. Tibial total and cortical area, cortical density, polar stress-strain index (SSI), and the mass and density distribution around the center of mass (polar distribution, mg) and through the bones cortex (radial distribution subdivided into endo-, mid-, and pericortical volumetric BMD: mg/cm(3)) at three sites (14, 38, and 66 %) were assessed using peripheral quantitative computed tomography after 7 years. Girls in the intervention group had 2.5 % greater cortical thickness and 6.9 % greater SSI at the 66 % tibia, which was accompanied by significantly greater pericortical volumetric BMD compared to controls (all P < 0.05). Region-specific differences in cortical mass were also detected in the anterior, medial, and lateral sectors at the 38 and 66 % tibial sites. There were no group differences at the 14 % tibia site in girls, and no group differences in any of the bone parameters in boys. Additional school-based physical education over seven years was associated with greater tibial structure, strength, and region-specific adaptations in cortical bone mass and density distribution in girls, but not in boys.
Language eng
DOI 10.1007/s00223-016-0174-y
Field of Research 110602 Exercise Physiology
1103 Clinical Sciences
0601 Biochemistry And Cell Biology
0903 Biomedical Engineering
Socio Economic Objective 920499 Public Health (excl. Specific Population Health) not elsewhere classified
HERDC Research category C1 Refereed article in a scholarly journal
ERA Research output type C Journal article
Copyright notice ©2016, The Authors
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