Fig. 1From: Validation of the Fitbit One® for physical activity measurement at an upper torso attachment siteBland Altman plots representing comparison between observed step counts (criterion) and Fitbit-estimated step counts for the upper torso-attached Fitbit One® (a), hip-attached Fitbit One® (b) and wrist-attached Fitbit Flex® (c). Solid lines indicate the mean difference between observed step counts and Fitbit-estimated step counts, and dashed lines indicate limits of agreementBack to article page