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dc.contributor.authorSagelv, Edvard Hamnvik
dc.contributor.authorEkelund, Ulf
dc.contributor.authorHopstock, Laila Arnesdatter
dc.contributor.authorAars, Nils Abel
dc.contributor.authorFimland, Marius Steiro
dc.contributor.authorJacobsen, Bjarne K.
dc.contributor.authorLøvsletten, Ola
dc.contributor.authorWilsgaard, Tom
dc.contributor.authorMorseth, Bente
dc.identifier.citationOccupational and Environmental Medicine. 2020, .en_US
dc.description.abstractObjective: To examine whether occupational physical activity changes predict future body mass index (BMI) changes. Methods: This longitudinal cohort study included adult participants attending ≥3 consecutive Tromsø Study surveys (examinations 1, 2 and 3) from 1974 to 2016 (N=11 308). If a participant attended >3 surveys, the three most recent surveys were included. Occupational physical activity change (assessed by the Saltin-Grimby Physical Activity Level Scale) was computed from the first to the second examination, categorised into persistently inactive (n=3692), persistently active (n=5560), active to inactive (n=741) and inactive to active (n=1315). BMI change was calculated from the second to the third examination (height being fixed at the second examination) and regressed on preceding occupational physical activity changes using analysis of covariance adjusted for sex, birth year, smoking, education and BMI at examination 2. Results: Overall, BMI increased by 0.84 kg/m2 (95% CI 0.82 to 0.89). Following adjustments as described previously, we observed no differences in BMI increase between the occupational physical activity change groups (Persistently Inactive: 0.81 kg/m2, 95% CI 0.75 to 0.87; Persistently Active: 0.87 kg/m2, 95% CI 0.82 to 0.92; Active to Inactive: 0.81 kg/m2, 95% CI 0.67 to 0.94; Inactive to Active: 0.91 kg/m2, 95% CI 0.81 to 1.01; p=0.25). Conclusion: We observed no prospective association between occupational physical activity changes and subsequent BMI changes. Our findings do not support the hypothesis that occupational physical activity declines contributed to population BMI gains over the past decades. Public health initiatives aimed at weight gain prevention may have greater success if focusing on other aspects than occupational physical activity.en_US
dc.publisherBMJ Publishing Groupen_US
dc.rightsNavngivelse-Ikkekommersiell 4.0 Internasjonal*
dc.titleDo declines in occupational physical activity contribute to population gains in body mass index? Tromsø Study 1974–2016en_US
dc.typePeer revieweden_US
dc.typeJournal articleen_US
dc.source.journalOccupational and Environmental Medicineen_US
dc.relation.projectUiT Norges arktiske universitet: 2047661en_US
dc.description.localcode"© 2020. This is the authors’ accepted and refereed manuscript to the article. This manuscript version is made available under the CC-BY-NC 4.0 license.en_US

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