Step count accuracy and reliability of two activity tracking devices in people after stroke.

Background/purpose: The increasing popularity of activity tracking devices presents an opportunity to monitor physical activity in patients after stroke. We sought to determine the reliability and accuracy of the Garmin Vivofit and Fitbit Zip for adults after stroke.

Methods: Twenty-four participants with stroke-induced hemiparesis wore a Fitbit Zip on the nonparetic hip and Garmin Vivofits on both wrists during a 6-minute walk test to determine the accuracy of the devices against video-determined step counts.