ArticleBMJ open2015
Leisure time computer use and adolescent bone health--findings from the Tromsø Study, Fit Futures: a cross-sectional study.
Article in BMJ open, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 18 papers, 4 of them syntheses that pooled it.
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Who cites it
18 citing papers in PubMed, 4 syntheses or guidelines pooled it.
- Association between sedentary behavior and bone mass, microstructure and strength in children, adolescents and young adults: a systematic review.BMC public health · 2024Pooled it
- Role of lifestyle factors in mediating the effect of educational attainment on bone mineral density: a Mendelian randomization study.Archives of osteoporosis · 2023Pooled it
- Screen Time and Bone Status in Children and Adolescents: A Systematic Review.Frontiers in pediatrics · 2021Pooled it
- Sedentary behaviour and bone health in children, adolescents and young adults: a systematic review.Osteoporosis international : a journal established as result of cooperation between the European Foundation for Osteoporosis and the National Osteoporosis Foundation of the USA · 2017Pooled it
- What is the connection between screen time and lifestyle factors important for bone health? Findings from the Hertfordshire Intergenerational Study.Archives of osteoporosis · 2026Article
- Problematic video gaming is negatively associated with bone mineral density in adolescents.European journal of pediatrics · 2024Article
- Associations of physical activity and screen time with adolescent idiopathic scoliosis.Environmental health and preventive medicine · 2023Article
- Academic-related factors and daily lifestyle habits associated with adolescent idiopathic scoliosis: a case-control study.Environmental health and preventive medicine · 2023Article
- Comparison of bone mineral density according to domains of sedentary behavior in children and adolescents.BMC pediatrics · 2022Article
- Common social determinants for overweight and obesity, and dental caries among adolescents in Northern Norway: a cross-sectional study from the Tromsø Study Fit Futures cohort.BMC oral health · 2021Article
- Headache and musculoskeletal pain in school children are associated with uncorrected vision problems and need for glasses: a case-control study.Scientific reports · 2021Article
- Screen Time, Age and Sunshine Duration Rather Than Outdoor Activity Time Are Related to Nutritional Vitamin D Status in Children With ASD.Frontiers in pediatrics · 2021Article
- Association between sedentary behavior and bone mass in adolescents.Osteoporosis international : a journal established as result of cooperation between the European Foundation for Osteoporosis and the National Osteoporosis Foundation of the USA · 2020Article
- Cross-sectional and longitudinal associations between physical activity, sedentary behaviour and bone stiffness index across weight status in European children and adolescents.The international journal of behavioral nutrition and physical activity · 2020Article
- Effects of Full Body Exergaming in Virtual Reality on Cardiovascular and Muscular Parameters: Cross-Sectional Experiment.JMIR serious games · 2019Article
- Longitudinal changes in body composition and waist circumference by self-reported levels of physical activity in leisure among adolescents: the Tromsø study, Fit Futures.BMC sports science, medicine & rehabilitation · 2019Article
- Bone mineral density at the hip and its relation to fat mass and lean mass in adolescents: the Tromsø Study, Fit Futures.BMC musculoskeletal disorders · 2018Article
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Authors and funding
8 authors.
Funding
Abstract
objectivesLow levels of physical activity may have considerable negative effects on bone health in adolescence, and increasing screen time in place of sporting activity during growth is worrying. This study explored the associations between self-reported screen time at weekends and bone mineral density (BMD).
designIn 2010/2011, 1038 (93%) of the region's first-year upper-secondary school students (15-18 years) attended the Tromsø Study, Fit Futures 1 (FF1). A follow-up survey (FF2) took place in 2012/2013. BMD at total hip, femoral neck and total body was measured as g/cm(²) by dual X-ray absorptiometry (GE Lunar prodigy). Lifestyle variables were self-reported, including questions on hours per day spent in front of television/computer during weekends and hours spent on leisure time physical activities. Complete data sets for 388/312 girls and 359/231 boys at FF1/FF2, respectively, were used in analyses. Sex stratified multiple regression analyses were performed.
resultsMany adolescents balanced 2-4 h screen time with moderate or high physical activity levels. Screen time was positively related to body mass index (BMI) in boys (p=0.002), who spent more time in front of the computer than girls did (p<0.001). In boys, screen time was adversely associated with BMDFF1 at all sites, and these associations remained robust to adjustments for age, puberty, height, BMI, physical activity, vitamin D levels, smoking, alcohol, calcium and carbonated drink consumption (p<0.05). Screen time was also negatively associated with total hip BMD(FF2) (p=0.031). In contrast, girls who spent 4-6 h in front of the computer had higher BMD than the reference (<2 h).
conclusionsIn Norwegian boys, time spent on screen-based sedentary activity was negatively associated with BMD levels; this relationship persisted 2 years later. Such negative associations were not present among girls. Whether this surprising result is explained by biological differences remains unclear.
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