Fitbit is a family of fitness devices that track heart rate, sleep, and activity. This integration allows participants, when prompted, to share past, present and future Fitbit data with a research study. Fitbit has sold more than 38 million devices worldwide and has more than 16 million active users. Fitbit has been used in an increasing number of research studies. Several of their devices have been validated for physical activity.
Last Updated on March 29, 2018