Whether you received the Fitbit as a Christmas gift, bought it in the new year hoping “this time would be different,” or it was doctor-recommended, many people rely on this small wrist-worn device for information about their health and daily habits. The Fitbit activity tracker uses a microelectronic triaxial accelerometer [1], which measures vibration in three axes, allowing it to measure body movement in a three-dimensional space. Types of measurements include daily steps taken, energy expenditure, sleep patterns, distance covered, and time spent in various activities [1]. In a recent article published in JMIR mHealth and uHealth [1], researchers from British Columbia, Canada, performed aRead More →