Journal of Bone and Mineral Metabolism

, Volume 33, Issue 1, pp 85–92 | Cite as

Sedentary time has a negative influence on bone mineral parameters in peripubertal boys: a 1-year prospective study

  • Artūrs Ivuškāns
  • Jarek MäestuEmail author
  • Toivo Jürimäe
  • Evelin Lätt
  • Priit Purge
  • Meeli Saar
  • Katre Maasalu
  • Jaak Jürimäe
Original Article


One of the key determinants of adult skeletal health is the maximization of bone mass during the growth period. Physical activity (PA) in combination with lean mass and fat mass contribute to a great extent to bone mineral accrual; however, PA changes significantly during puberty. The aim of the present study was to examine PA exposure relative to bone mass acquisition during a longer observation period. Daily PA was measured with 7-day accelerometry and bone mineral parameters by DXA in 11- to 13-year-old peripubertal boys (n = 169). Similar testing was done after 1 calendar year. Changes in sedentary time were negatively related to changes in whole-body bone mineral density (BMD), lumbar spine bone mineral content (BMC), lumbar spine bone area (BA), femoral neck (FN) BMD, and FN BMC (r > −0.157; p < 0.05). Sedentary time emerged as the main PA level in predicting changes in FN BMC (p = 0.027) and in combination with vigorous PA predicting changes in FN BMD (p < 0.024). In addition to the effect of body composition on the skeleton, increase in sedentary time emerged as one main physical activity predictor (in addition to vigorous PA) of bone mineral acquisition during a 12-month period in peripubertal boys.


Bone mineral density Sedentary time Accelerometry DXA Boys 



This study was supported by a grant from the Estonian Ministry of Education and Science (TKKSP 0489) and by the European Social Fund’s Doctoral Studies and Internationalisation Programme DoRa.

Conflict of interest

All authors have no conflicts of interest.


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Copyright information

© The Japanese Society for Bone and Mineral Research and Springer Japan 2014

Authors and Affiliations

  • Artūrs Ivuškāns
    • 1
  • Jarek Mäestu
    • 1
    Email author
  • Toivo Jürimäe
    • 1
  • Evelin Lätt
    • 1
  • Priit Purge
    • 1
  • Meeli Saar
    • 1
  • Katre Maasalu
    • 2
  • Jaak Jürimäe
    • 1
  1. 1.Faculty of Exercise and Sport Sciences, Centre of Behavioural and Health SciencesUniversity of TartuTartuEstonia
  2. 2.Faculty of MedicineUniversity of TartuTartuEstonia

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