Comparison of wrist-worn Fitbit Flex and waist-worn ActiGraph for measuring steps in free-living adults.
Anne Hin Yee ChuSheryl H X NgMahsa PaknezhadAlvaro GauterinDavid KohMichael S BrownFalk Müller-RiemenschneiderPublished in: PloS one (2017)
There were high correlations and agreement in steps between Fitbit Flex and ActiGraph. However, findings suggested discrepancies in steps between devices. This imposed a challenge that needs to be considered when using Fibit Flex in research and health promotion programs.