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Objectively-measured sedentary time, habitual physical activity and bone strength in adults aged 62 years: the Newcastle Thousand Families Study.

Hind, K. and Hayes, L. and Basterfield, L. and Pearce, M. S. and Birrell, F. (2019) 'Objectively-measured sedentary time, habitual physical activity and bone strength in adults aged 62 years: the Newcastle Thousand Families Study.', Journal of public health. .

Abstract

Background The influence of sedentary time and habitual physical activity on the bone health of middle aged adults is not well known. Methods Bone mineral density (BMD) and hip bone geometry were evaluated in 214 men (n = 92) and women (n = 112) aged 62.1 ± 0.5 years from the Newcastle Thousand Families Study birth cohort. Accelerometry was used to measure physical activity (PA) and sedentary time over 4 days. Regression models were adjusted for clinical risk factor covariates. Results Men were more sedentary than women (P < 0.05), and sedentary time was negatively associated with spine BMD in men, with 84 minutes more sedentary time corresponding to 0.268 g.cm−2 lower BMD (β = −0.268; P = 0.017). In men, light PA and steps/day were positively associated with bone geometry and BMD. Steps/day was positively associated with bone geometry and femur BMD in women, with a positive difference of 1415 steps/day corresponding to 0.232 g.cm−2 greater BMD (β = 0.232, P = 0.015). Conclusions Sedentary time was unfavourably associated with bone strength in men born in North East England at age 62 years. Higher volumes of light PA, and meeting the public health daily step recommendations (10 000 steps/day) was positively associated with bone health in both sexes.

Item Type:Article
Full text:Publisher-imposed embargo
(AM) Accepted Manuscript
First Live Deposit - 26 April 2019
File format - PDF
(209Kb)
Full text:Publisher-imposed embargo until 24 April 2020.
(AM) Accepted Manuscript
File format - PDF (Revised version)
(244Kb)
Status:Peer-reviewed
Publisher Web site:https://doi.org/10.1093/pubmed/fdz029
Publisher statement:This is a pre-copyedited, author-produced PDF of an article accepted for publication in Journal of Public Health following peer review. The version of record [insert complete citation information here] is available online at: https://doi.org/10.1093/pubmed/fdz029
Record Created:26 Apr 2019 16:43
Last Modified:24 May 2019 11:12

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