Orthostatic Heart Rate
From Fellrnr.com, Running tips
A simplified chart of heart rate against exercise intensity showing Maximum Heart Rate, Heart Rate Reserve, Resting Heart Rate, Orthostatic Heart Rate, and Heart Rate Deflection.
The Orthostatic Heart Rate the heart rate when standing. This Heart Rate is slightly above Resting Heart Rate as resting HR is taken either lying down or seated. A difference between Resting Heart Rate and Orthostatic Heart Rate is normally 10-15 BPM. I believe this is a more useful value than resting heart rate as it reflects the Heart Rate a "zero power". The Orthostatic Heart Rate is part of the Orthostatic Heart Rate Test.
