Last Updated on March 12, 2023 by pg@petergamma.org 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 … Continue reading How does Garmin and Apple calculate resting heart rate?