Elevate workouts with continuous heart rate and simplified zones—all without an uncomfortable chest strap. Check heart rate at a glance to gauge your effort and adjust workouts on the spot. Set a target heart rate zone to ensure you're pushing yourself hard enough, but not overtraining. See your time spent in each heart rate zone and review exercise summaries. Connect Fitbit Blaze with the GPS on your phone to map your routes and see run stats like pace and duration on display. You can start a FitStar workout on your tracker and get step-by-step instructions and coaching right on your wrist.