Exercise, bone mass and bone size in prepubertal boys: one-year data from the pediatric osteoporosis prevention study.

Christian Lindén, Gayani Alwis, Henrik Ahlborg, P Gardsell, Örnolfur Valdimarsson, Susanna Stenevi Lundgren, Jack Besjakov, M K Karlsson

Research output: Contribution to journalArticlepeer-review


This non-randomized prospective controlled study evaluates a daily school-based exercise intervention program of 40 min/school day for I year in a population-based cohort of 81 boys aged 7-9 years. Controls were 57 age-matched boys assigned to the general school curriculum of 60min/ week. Bone mineral content BMC; g) and areal bone mineral density (aBMD; g/cm(2)) were measured with dual X-ray absorptiometry (DXA) of the total body, the third lumbar vertebra (L3) and the femoral neck (FN). Bone width for L3 and FN was calculated from the lumbar spine and hip scan. No differences between the groups were found at baseline in age, anthropometrics or bone parameters. The mean annual gain in L3 BMC was 5.9 percentage points higher (P < 0.001), L3 aBMD a mean 2.1 percentage points higher (P = 0.01) and L3 width a mean 2.3 percentage points higher (P = 0.001) in the cases than in the controls. When all individuals were included in one cohort, the total duration of exercise including both school-based and spare-time training correlated with L3 BMC (r = 0.26, P = 0.003), L3 aBMD (r = 0.18, P = 0.04) and L3 width (r = 0.24, P = 0.006). The study suggests that exercise in pre-pubertal boys influences the accrual of bone mineral and bone width and that a 1-year school-based exercise program confers skeletal benefits, at least in the lumbar spine.
Original languageEnglish
Pages (from-to)340-347
JournalScandinavian Journal of Medicine & Science in Sports
Issue number4
Publication statusPublished - 2007

Bibliographical note

The information about affiliations in this record was updated in December 2015.
The record was previously connected to the following departments: Reconstructive Surgery (013240300), Clinical and Molecular Osteoporosis Research Unit (013242930), Medical Radiology Unit (013241410)

Subject classification (UKÄ)

  • Sport and Fitness Sciences


  • bone mineral density
  • bone width
  • boys
  • tanner I
  • prepubertal
  • physical activity
  • bone mineral content


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