Tom_hampton wrote:
The gold standard for HRV is electrical (ecg) measurement of the r-r intervals between successive qrs waves. Not any optical device measuring pulse intervals, at all. I would be quite suspicious of any ohr device that showed data differently than an electrical measurement. I'm aware that it works for some people... My point is it doesn't work for all. My autonomic system seems to react differently than yours. However, I've had similar conversations with other reputable individuals who know how to take controlled data under repeatable conditions---eith observations similar to mine.
I see your point, but unless you have done the ECG-measurement yourself, I don't think you can rule yourself out as an HRV-nonresponder.'
Similarly, the optical sensor in the current-gen Garmin seems to be giving me and others very plausible readings. Sure, I haven't gold-standard ECG'd it, but it's certainly correlating well with strain and recovery thus far - really well.