What Happens When the Apple Watch Ultra is More Accurate than the Polar H10 Chest Strap?

Last Updated on September 25, 2022 by pg@petergamma.org

In Rob ter Horsts latests scientific tests, there is evidence, that the Apple Watch Ultra could be more accurate than a Polar H10 chest strap:

What shall we do now? The reference device should be more accurate than the device which is under investigation. We suggest to develop a reference device which is optimized for accuracy:

90.17 Generally accepted highly accurate ECG reference devices for accuracy studies for consumer grade heart rate monitors?