Comparison of bone mineral density according to domains of sedentary behavior in children and adolescents

BMC Pediatrics

Jorge Mota¹  Gregore Iven Mielke²  Gabriela Caroline Rodrigues da Silva³  Diego Giulliano Destro Christofaro³  William Rodrigues Tebar³  Bruna Thamyres Ciccotti Saraiva³  Amanda Barbosa dos Santos³  Raphael Mendes Ritti-Dias⁴ 

[1] Research Center on Physical Activity, Health and Leisure (CIAFEL), Faculty of Sport, University of Porto, Porto, Portugal;School of Human Movement and Nutrition Sciences, The University of Queensland, Brisbane, Australia;School of Technology and Sciences, Presidente Prudente, São Paulo State University (Unesp), Roberto Simonsen street, number 305, 19.060-900, Presidente Prudente, Sao Paulo, Brazil;Universidade Nove de Julho (UNINOVE), Sao Paulo, Brazil;

关键词: Adolescent;    Bone density;    Child;    Health;    Sedentary;   

DOI  :  10.1186/s12887-022-03135-2

来源: Springer

【 摘 要 】

BackgroundSomatic maturation and the age at onset of puberty are closely related to bone mineral density (BMD), and are potential confounders of the associations between physical activity, sedentary behavior (SB) and BMD in adolescents. Thus the aim was compare BMD at different anatomical sites according to different domains of SB.MethodsThe sample consisted of 88 young people (54 boys and 34 girls; 9.5 ± 1.5 years). The self-reported SB was measured by the time spent on TV, computer, video game and smartphone. BMD at each location and throughout the body was assessed by DEXA. Physical activity was assessed by a questionnaire. The comparison of the different types of BMD sites according to the SB levels for each screen device and the total SB were analyzed by Covariance Analysis (ANCOVA).ResultsWhole-body BMD was higher in young people with low total SB (Total BMD = 0.957 ± 0.042) than in those with moderate (Total BMD = 0.921 ± 0.053) and high SB (Total BMD = 0.929 ± 0.051) (p-value = 0.011). Children and adolescents with low total SB had higher BMD legs (0.965 ± 0.056) than young people with high total SB (BMD legs = 0.877 ± 0.209), but this relationship was attenuated when the analyzes were adjusted for physical activity (p-value = 0.068).ConclusionAdolescents with high sedentary behavior tend to have lower whole body bone mineral density than those with low sedentary behavior.

【 授权许可】

CC BY