caa a22 4500 605462925 CHVBK 20210128100250.0 cr unu---uuuuu 210128e20150101xx s 000 0 eng 10.1007/s00774-013-0556-4 doi (NATIONALLICENCE)springer-10.1007/s00774-013-0556-4 Sedentary time has a negative influence on bone mineral parameters in peripubertal boys: a 1-year prospective study [Elektronische Daten] [Artūrs Ivuškāns, Jarek Mäestu, Toivo Jürimäe, Evelin Lätt, Priit Purge, Meeli Saar, Katre Maasalu, Jaak Jürimäe] 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. The Japanese Society for Bone and Mineral Research and Springer Japan, 2014 Bone mineral density nationallicence Sedentary time nationallicence Accelerometry nationallicence DXA nationallicence Boys nationallicence Ivuškāns Artūrs Faculty of Exercise and Sport Sciences, Centre of Behavioural and Health Sciences, University of Tartu, Ravila 14a, 50411, Tartu, Estonia aut Mäestu Jarek Faculty of Exercise and Sport Sciences, Centre of Behavioural and Health Sciences, University of Tartu, Ravila 14a, 50411, Tartu, Estonia aut Jürimäe Toivo Faculty of Exercise and Sport Sciences, Centre of Behavioural and Health Sciences, University of Tartu, Ravila 14a, 50411, Tartu, Estonia aut Lätt Evelin Faculty of Exercise and Sport Sciences, Centre of Behavioural and Health Sciences, University of Tartu, Ravila 14a, 50411, Tartu, Estonia aut Purge Priit Faculty of Exercise and Sport Sciences, Centre of Behavioural and Health Sciences, University of Tartu, Ravila 14a, 50411, Tartu, Estonia aut Saar Meeli Faculty of Exercise and Sport Sciences, Centre of Behavioural and Health Sciences, University of Tartu, Ravila 14a, 50411, Tartu, Estonia aut Maasalu Katre Faculty of Medicine, University of Tartu, Ravila 19, 50411, Tartu, Estonia aut Jürimäe Jaak Faculty of Exercise and Sport Sciences, Centre of Behavioural and Health Sciences, University of Tartu, Ravila 14a, 50411, Tartu, Estonia aut Journal of Bone and Mineral Metabolism Springer Japan 33/1(2015-01-01), 85-92 0914-8779 33:1<85 2015 33 774 https://doi.org/10.1007/s00774-013-0556-4 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s00774-013-0556-4 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Ivuškāns Artūrs Faculty of Exercise and Sport Sciences, Centre of Behavioural and Health Sciences, University of Tartu, Ravila 14a, 50411, Tartu, Estonia aut NATIONALLICENCE 700 1- Mäestu Jarek Faculty of Exercise and Sport Sciences, Centre of Behavioural and Health Sciences, University of Tartu, Ravila 14a, 50411, Tartu, Estonia aut NATIONALLICENCE 700 1- Jürimäe Toivo Faculty of Exercise and Sport Sciences, Centre of Behavioural and Health Sciences, University of Tartu, Ravila 14a, 50411, Tartu, Estonia aut NATIONALLICENCE 700 1- Lätt Evelin Faculty of Exercise and Sport Sciences, Centre of Behavioural and Health Sciences, University of Tartu, Ravila 14a, 50411, Tartu, Estonia aut NATIONALLICENCE 700 1- Purge Priit Faculty of Exercise and Sport Sciences, Centre of Behavioural and Health Sciences, University of Tartu, Ravila 14a, 50411, Tartu, Estonia aut NATIONALLICENCE 700 1- Saar Meeli Faculty of Exercise and Sport Sciences, Centre of Behavioural and Health Sciences, University of Tartu, Ravila 14a, 50411, Tartu, Estonia aut NATIONALLICENCE 700 1- Maasalu Katre Faculty of Medicine, University of Tartu, Ravila 19, 50411, Tartu, Estonia aut NATIONALLICENCE 700 1- Jürimäe Jaak Faculty of Exercise and Sport Sciences, Centre of Behavioural and Health Sciences, University of Tartu, Ravila 14a, 50411, Tartu, Estonia aut NATIONALLICENCE 773 0- Journal of Bone and Mineral Metabolism Springer Japan 33/1(2015-01-01), 85-92 0914-8779 33:1<85 2015 33 774