Physical activity levels in adults and elderly from triaxial and uniaxial accelerometry. The Tromsø Study. ...

• Main Authors: Sagelv, Edvard H, Ekelund, Ulf, Pedersen, Sigurd, Brage, Søren, Hansen, Bjørge H, Johansson, Jonas, Grimsgaard, Sameline, Nordström, Anna, Horsch, Alexander, Hopstock, Laila A, Morseth, Bente
• Format: Article in Journal/Newspaper
• Language: English
• Published: Public Library of Science (PLoS) 2019
• Subjects: Accelerometry; Age Distribution; Aged; Cross-Sectional Studies; Exercise; Female; Humans; Male; Middle Aged; Norway; Sedentary Behavior; Wearable Electronic Devices; Tromsø
• Online Access: https://dx.doi.org/10.17863/cam.47228; https://www.repository.cam.ac.uk/handle/1810/300157

INTRODUCTION: Surveillance of physical activity at the population level increases the knowledge on levels and trends of physical activity, which may support public health initiatives to promote physical activity. Physical activity assessed by accelerometry is challenged by varying data processing procedures, which influences the outcome. We aimed to describe the levels and prevalence estimates of physical activity, and to examine how triaxial and uniaxial accelerometry data influences these estimates, in a large population-based cohort of Norwegian adults. METHODS: This cross-sectional study included 5918 women and men aged 40-84 years who participated in the seventh wave of the Tromsø Study (2015-16). The participants wore an ActiGraph wGT3X-BT accelerometer attached to the hip for 24 hours per day over seven consecutive days. Accelerometry variables were expressed as volume (counts·minute-1 and steps·day-1) and as minutes per day in sedentary, light physical activity and moderate and vigorous physical ...