Just because it's the most "accurate" doesn'mean it's the most "useful", "correct", or "reliable" in this context. It just means reproducible, if I read it corr

Just because it's the most "accurate" doesn'mean it's the most "useful", "correct", or "reliable" in this context. It just means reproducible, if I read it correctly. In the same way that if they mistakenly chose to represent HRV by the heart rate, this measure would probably be very "accurate" (but ultimately false). The issue of which HRV measure is the most useful, and what they show exactly, is still an open issue in HRV research afaiu