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Adolescent physical activity, sedentary behavior and sleep in relation to body composition at age 18 years in urban South Africa, Birth-to-Twenty+ Cohort

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dc.contributor.authorMicklesfield, L.K.
dc.contributor.authorHanson, S.K.
dc.contributor.authorLobelo, F.
dc.contributor.authorCunningham, S.A.
dc.contributor.authorHartman, T.J.
dc.contributor.authorNorris, S.A.
dc.contributor.authorStein, A.D.
dc.contributor.departmentShane A. Norris: MRC/Wits Developmental Pathways for Health Research Unit, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, South Africaen_US
dc.date.accessioned2024-03-22T20:00:04Z
dc.date.available2024-03-22T20:00:04Z
dc.date.epub2021-01-11
dc.date.issued2021
dc.description.abstractBackground Adolescence is marked by a decline in physical activity, rapid physical growth and changes in body composition, which have been linked to body composition. Prospective data on these associations are rare, particularly in Africa. Aim The aim of this study was to examine the association of longitudinal patterns across adolescent in physical activity, sedentary behavior and sleep, with anthropometry and body composition at age 18 years in urban South Africa. Methods We analyzed data from the Birth-to-Twenty Plus Cohort (Bt20+), a longitudinal study of children born in 1990 in Soweto-Johannesburg, South Africa. We used general linear models to investigate the association of adolescent (ages 12 to 18 years) longitudinal trends in physical activity, sedentary behavior and schoolnight sleep and overall physical activity patterns, with body mass index (BMI), waist circumference, fat mass index (FMI), lean mass index (LMI) and percent body fat at age 18 years. Results The final study sample included 1337 participants with anthropometric measurements (52% female) and 958 participants with body composition measurements (53% female). Males who were consistently more active and consistently walked to school over adolescence had lower waist circumference (B = − 2.0, 95% CI: − 3.9 to − 0.2), FMI (B = − 0.8, 95%: CI: − 1.2 to − 0.1) and percent body fat (B = -2.9, 95% CI: − 4.9 to − 0.9) at age 18 years than those who decreased activity and did not walk to school. Consistently-sedentary females had higher waist circumference than those whose sedentary behavior increased over adolescence (B = 5.4, 95% CI: 0.2 to 10.6). Males who reported sleeping 9 h or more per night on schoolnights had significantly lower BMI (B = -1.0, 95% CI: − 1.4 to- 0.5), and percent body fat (B = -1.5, 95%CI − 2.8 to − 0.1) than those who reported sleeping 8 h or less per night. Conclusion Patterns of adolescent physical activity, sedentary behavior and sleep are related to young-adult body composition in urban South Africa. These modifiable behaviors may be paths for public health interventions to curb overweight and obesity in many low- or middle-income countries.en_US
dc.description.sponsorshipThe South African Medical Research Council, the University of the Witwatersrand, Johannesburg, South Africa, the Wellcome Trust UK, and the Department of Science and Technology / National Research Foundation Centre of Excellence in Human Development at the University of the Witwatersrand have funded and supported the Bt20+ cohort.en_US
dc.identifier.citationMicklesfield LK, Hanson SK, Lobelo F, Cunningham SA, Hartman TJ, Norris SA, Stein AD. Adolescent physical activity, sedentary behavior and sleep in relation to body composition at age 18 years in urban South Africa, Birth-to-Twenty+ Cohort. BMC Pediatr. 2021 Jan 11;21(1):30. doi: 10.1186/s12887-020-02451-9.en_US
dc.identifier.doi10.1186/s12887-020-02451-9
dc.identifier.journalBMC Pediatricsen_US
dc.identifier.urihttps://www.ncbi.nlm.nih.gov/pmc/articles/PMC7798220/
dc.identifier.urihttps://hdl.handle.net/11288/595679
dc.language.isoenen_US
dc.publisherBioMeden_US
dc.research.unitDevelopmental Pathways for Health Researchen_US
dc.rightsAttribution 3.0 United States*
dc.rights.urihttp://creativecommons.org/licenses/by/3.0/us/*
dc.subjectAdolescenten_US
dc.subjectPhysical activityen_US
dc.subjectSedentary behavior and sleepen_US
dc.subjectSouth Africaen_US
dc.subjectSDG-03 Good health and well-beingen_US
dc.titleAdolescent physical activity, sedentary behavior and sleep in relation to body composition at age 18 years in urban South Africa, Birth-to-Twenty+ Cohorten_US
dc.typeArticleen_US
dspace.entity.typePublication
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