In early adolescence, each additional hour of moderate-vigorous physical activity (MVPA) is associated with small increases in bone size and strength; and sedentary activity had little impact on bone.
- Osborn W, Simm P, Olds T, Lycett K, Mensah FK, Muller J, et al. Bone health, activity and sedentariness at age 11-12 years: Cross-sectional Australian population-derived study. Bone. 2018;112(153-160). DOI: 10.1016/j.bone.2018.04.011
Bone geometry and density show strong parent-child concordance even before the period of peak adolescent bone deposition.
- Vlok J, Simm PJ, Lycett K, Clifford SA, Grobler AC, Lange K, et al. pQCT bone geometry and strength: population epidemiology and concordance in Australian children aged 11-12 years and their parents. BMJ Open. 2019. 9(Suppl 3): p. 63-74. DOI: 10.1136/bmjopen-2018-022400.
This paper demonstrates the application of compositional data analysis to show that, among adults, greater body mass is associated with stronger bones, but at every level of body mass, stronger bones are associated with body compositions with higher proportions of fat-free mass and lower proportions of truncal and non-truncal fat.
- Dumuid D, Martín-Fernández JA, Ellul D, Kenett RS, Wake M, Simm P, Baur L & Olds T. Analysing body composition as compositional data: An exploration of the relationship between body composition, body mass and bone strength. Statistical Methods in Medical Research. 2020. DOI: https://doi.org/10.1177%2F0962280220955221
This study describes the Goldilocks “just right” daily durations of physical activity (moderate-to-vigorous and light intensities), sedentary time and sleep that are associated with the best skeletal health in children.
- Dumuid D, Simm P, Wake M, Burgner D, Juonala M, Wu F, et al. The "Goldilocks Day" for Children's Skeletal Health: Compositional Data Analysis of 24-Hour Activity Behaviors. J Bone Miner Res. 2020 Jul 30. doi: 10.1002/jbmr.4143. Epub ahead of print. PMID: 32730680.