Garmin Resting Heart Rate: The value is for the current day. Daily RHR is calculated using the lowest 30 minute average in a 24 hour period: https://support.garmin.com/en-US/?faq=F8YKCB4CJd5PG0DR9ICV3A Unfortunately, we cannot find exactly the formula and the details how Garmin does their resting heart rate calculations. Apple Resting Heart Rate: It takes a measurement every 10 …
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