BACKGROUND: Increased physical activity levels and their determinations are essential issues worldwide. The Longitudinal Study of Physical Activity Determinants (ELDAF) aims to understand the roles of psychosocial and environmental factors in workers' physical activity levels. METHODS: A prospective cohort study of non-faculty civil servants from a public university (approximately 1,200 individuals) will start in 2022 (baseline). The primary measurements will be accelerometer- and questionnaire-based physical activity, social support, social network, socioeconomic status, bereavement, job stress, body image, common mental disorders, depression, and neighborhood satisfaction. Additional measurements will include necessary sociodemographic, physical morbidity, lifestyle and anthropometric information. Participants' places of residence will be geocoded using complete addresses. All participants will furnish written, informed consent before the beginning of the study. Pilot studies were performed to identify and correct potential problems in the data collection instruments and procedures. ELDAF will be the first cohort study conducted in Latin America to investigate physical activity and its determinants.

Centre for Health Equity Studies Stockholm University Karolinska Institutet Stockholm Sweden

Department of Epidemiology Institute of Social Medicine State University of Rio de Janeiro Rio de Janeiro Brazil

Department of Public Health Sciences Stockholm University Stockholm Sweden

Evandro Chagas National Institute of Infectious Disease Oswaldo Cruz Foundation Rio de Janeiro RJ Brazil

International Clinical Research Center Brno Czech Republic

Laboratory of Health and Environment Education Oswaldo Cruz Institute Fiocruz Rio de Janeiro Brazil

Laboratory of Social Dimensions Applied to Physical Activity and Sport Rural Federal University of Rio de Janeiro Seropédica Brazil

PLoS One. 2022 Jul 5;17(7):e0271139. doi: 10.1371/journal.pone.0271139. PubMed

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