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The research is mixed as to the effectiveness of various wearable fitness trackers on the market so farâ a 2013 study found that trackers mounted on shoes monitored movement far more efficiently than those at hip-level.
For all-day wear when youâre not exercising, your tracker should usually rest a fingerâs width below your wrist bone and lay flat, just as you would wear a watch. Fitbitâs PurePulse heart rate tracking system is designed to be most accurate when the tracker is worn on the top of your wrist.