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dc.contributor.authorHajna, Samanthaen
dc.contributor.authorWhite, Thomasen
dc.contributor.authorBrage, Sorenen
dc.contributor.authorVan Sluijs, Estheren
dc.contributor.authorWestgate, Kateen
dc.contributor.authorJones, Andyen
dc.contributor.authorLuben, Roberten
dc.contributor.authorKhaw, Kay-Teeen
dc.contributor.authorWareham, Nicholasen
dc.contributor.authorGriffin, Simonen
dc.description.abstractBackground Sedentary time increases and total physical activity decreases with age. The magnitude and correlates of changes in sedentary time, light-intensity physical activity (LPA), moderate-to-vigorous intensity physical activity (MVPA), and overall physical activity remain unclear. We quantified these changes and identified their individual and sociodemographic correlates. Methods We used data from 1,259 adults (67.8±6.9 years; 41.9% women) who participated in the EPIC-Norfolk Study. Activity was assessed at baseline (2004-2011) and follow-up (2012-2016) for 7 days using accelerometers. Potential correlates of change were specified a priori. We used unadjusted and adjusted sex-stratified linear regressions to identify correlates of change. Results Only 3.7% of adults met the current MVPA recommendations. Sedentary time increased by 3.0 min/day/year (SD=12.3). LPA, MVPA, and overall PA decreased by 1.7 min/day/year (SD=5.4), 3.0 min/day/year (SD=6.0), and 8.8 counts/minute/year (SD=18.8), respectively. Correlates of greater rates of increase in sedentary time included older age and higher BMI in men, and older age, higher BMI, smoking, and urban dwelling in women. Correlates of greater rates of decrease in physical activity included older age, higher BMI, living alone, depression, car use, and/or fair/poor self-rated health in men, and older age, higher BMI, depression, smoking, and/or urban dwelling in women (e.g. depressed women had a 1.0 min/day/year greater rate of decline in MVPA than non-depressed women, 95% CI -1.8, -0.2). Conclusions Most (>95%) adults are insufficiently active. Sedentary time increases and LPA, MVPA and overall physical activity decreases over time, with more pronounced rates of change observed in specific sub-groups (e.g. among older and depressed adults). To promote active living, the correlates of these changes should be considered in future interventions.
dc.description.sponsorshipThis work was supported by the Lifelong Health and Wellbeing Cross-Council Programme (MR/K025147/1 to SJG, NJW and AJ), the Medical Research Council (MRC) (MC_UU_12015/4 to SJG, MC_UU_12015/3 to SB, MC_UU_12015/7 to EvS, MC_UU_12015/1 to NJW), the Canadian Institutes of Health Research (FRN 146766; Fellowship to SH), and MedImmune (Studentship to TW). The EPIC-Norfolk study is supported by programme grants from the Medical Research Council (G0401527) and Cancer Research UK (C864/A8257) and Age UK (Grant reference: 262). The work was supported by the Centre for Diet and Activity Research (CEDAR), a UKCRC Public Health Research Centre of Excellence which is funded by the British Heart Foundation, Cancer Research UK, Economic and Social Research Council, Medical Research Council, the National Institute for Health Research, and the Wellcome Trust (087636/Z/08/Z; ES/G007462/1; MR/K023187/1). The University of Cambridge has received salary support in respect of SJG from the NHS in the East of England through the Clinical Academic Reserve. The views expressed are those of the authors and not necessarily those of the NHS or the Department of Health.
dc.publisherBioMed Central
dc.rightsAttribution 4.0 International
dc.subjectCohort Studiesen
dc.subjectFollow-Up Studiesen
dc.subjectHealth Behavioren
dc.subjectAge Factorsen
dc.subjectAged, 80 and overen
dc.subjectMiddle Ageden
dc.subjectSedentary Behavioren
dc.titleDescriptive epidemiology of changes in objectively measured sedentary behaviour and physical activity: six-year follow-up of the EPIC-Norfolk cohort.en
prism.publicationNameThe international journal of behavioral nutrition and physical activityen
dc.contributor.orcidHajna, Samantha [0000-0002-0431-2787]
dc.contributor.orcidWhite, Thomas [0000-0001-8456-0803]
dc.contributor.orcidBrage, Soren [0000-0002-1265-7355]
dc.contributor.orcidvan Sluijs, Esther [0000-0001-9141-9082]
dc.contributor.orcidWestgate, Kate [0000-0002-0283-3562]
dc.contributor.orcidLuben, Robert [0000-0002-5088-6343]
dc.contributor.orcidWareham, Nicholas [0000-0003-1422-2993]
dc.contributor.orcidGriffin, Simon [0000-0002-2157-4797]
rioxxterms.typeJournal Article/Reviewen
pubs.funder-project-idMRC (MC_UU_12015/4)
pubs.funder-project-idMRC (MC_UU_12015/1)
pubs.funder-project-idMRC (MC_UU_12015/7)
pubs.funder-project-idMRC (MC_UU_12015/3)
pubs.funder-project-idWellcome Trust (087636/Z/08/Z)
pubs.funder-project-idESRC (ES/G007462/1)
pubs.funder-project-idMRC (MR/K023187/1)
pubs.funder-project-idMRC (MR/K025147/1)
pubs.funder-project-idDepartment of Health (via National Institute for Health Research (NIHR)) (NF-SI-0515-10119)
pubs.funder-project-idMedical Research Council (G0501294)
pubs.funder-project-idDepartment of Health (via National Institute for Health Research (NIHR)) (NF-SI-0617-10149)
pubs.funder-project-idDepartment of Health (via National Institute for Health Research (NIHR)) (NF-SI-0512-10135)
pubs.funder-project-idMRC (G0401527)
pubs.funder-project-idCancer Research UK (A8257)

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Attribution 4.0 International
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