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The aim of this study was to identify how demographics, physical activity (PA) history, and environmental and biological correlates are associated with objectively measured PA among older adults. PA was assessed objectively in 850 older adults (70–77 years, 48% females) using the ActiGraph GT3X+ activity monitor. Hierarchical multiple regression analysis was used to identify important PA correlates. The included correlates explained 27.0% of the variance in older adult’s PA. Cardiorespiratory fitness (CRF), gender, and season were the most important correlates, explaining 10.1%, 3.9%, and 2.7% of the variance, respectively. PA was positively associated with CRF, females were more physically active than males, and PA increased in warmer months compared with colder months. This is, to our knowledge, the largest study of PA correlates in older adults that has combined objectively measured PA and CRF. Our findings provide new knowledge about how different correlates are associated with PA.
First authors. Viken, Zisko, and Stensvold are with the K.G. Jebsen Center of Exercise in Medicine, Department. of Circulation and Medical Imaging, Faculty of Medicine, Norwegian University of Science and Technology, Trondheim, Norway; and St. Olavs Hospital, Trondheim University Hospital, Trondheim, Norway. Aspvik and Ingebrigtsen are with the Department of Sociology and Political Science, Faculty of Social Sciences and Technology Management, Norwegian University of Science and Technology, Trondheim, Norway. Wisløff is with K.G. Jebsen Center of Exercise in Medicine, Deptartment of Circulation and Medical Imaging, Faculty of Medicine, Norwegian University of Science and Technology, Trondheim, Norway.