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Prenatal and birth predictors of objectively measured physical activity and sedentary time in three population-based birth cohorts in Brazil

Published version
Peer-reviewed

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Authors

Mielke, Gregore I. 
Silva, Inacio Crochemore M.  ORCID logo  https://orcid.org/0000-0001-5390-8360
Wehrmeister, Fernando C.  ORCID logo  https://orcid.org/0000-0001-7137-1747

Abstract

Abstract: Physical inactivity is a global pandemic with no signs of improvement. Prolonged sitting time is an emerging risk factor that exacerbates the health consequences of physical inactivity. Both behaviours are influenced by various individual and environmental factors but it remains unknown whether early-life exposures “program” these behaviours in later life. The current evidence is limited by a small number of studies which were primarily conducted in high-income countries, and a narrow range of early-life variables examined. Using data from three population-based Brazilian birth cohorts (analytical samples: n = 2740 for 1982 cohort, aged 30 years; n = 3592 for 1993 cohort, aged 18; n = 2603 for 2004 cohort, aged 6), we show that being female and higher family socioeconomic status at birth are strong and consistent predictors of lower physical activity and higher sedentary time from childhood to adulthood. Meanwhile, higher birth weight and lower birth order may also predict lower physical activity and higher sedentary time. Our findings are distinct from evidence from high-income countries, suggesting the importance of broader socioeconomic context in determining individual’s activity patterns through the life- course. Such evidence is essential for understanding the biological etiology and socioeconomic context of physical activity and sedentary behaviour at an early stage in life.

Description

Funder: University of Sydney; doi: https://doi.org/10.13039/501100001774


Funder: RCUK | Medical Research Council (MRC); doi: https://doi.org/10.13039/501100000265

Keywords

Article, /692/700/478/174, /692/499, article

Journal Title

Scientific Reports

Conference Name

Journal ISSN

2045-2322

Volume Title

10

Publisher

Nature Publishing Group UK
Sponsorship
Wellcome Trust (Wellcome) (WT086974MA)