VARIABLE ACCURACY OF COMMERCIALLY AVAILABLE WEARABLE HEART RATE MONITORS

Background: The accuracy of wrist-worn heart rate (HR) monitors is unconfirmed. We assessed accuracy of 5 wrist-worn HR monitors (Apple Watch, Fitbit Blaze, Garmin Forerunner 235, TomTom Spark Cardio, Scosche Rhythm+) during various types of exercise. Methods: Fifty volunteers completed exercise