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 Heart Rate: It takes a measurement every 10 minutes when it’s not tracking an Exercise:
Unfortunately, we cannot find exactly the formula and the details how Apple does their resting heart rate calculations. Both Apple and Garmin do not publish the exact formula and the parameters for their calculations. If we have open source hard and software, we have this data and these parameters. This makes those devices more suitable for scientific purposes.
We do not know of any reviews of Rob ter Horst or DC Rainmaker about topics as this one. Is this because it could lower the sales rates of these devices? If so, are they objective reviewers who tell us the truth?