Garmin

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SPR Mar 2023 8:42am, 15 Mar 2023 39,830 posts	SPR I don't think the HRV from optical works as the numbers differ from when a chest strap is worn (at least they used to, it's not something I've looked at for a while). Can't see that page btw.
larkim Mar 2023 8:48am, 15 Mar 2023 20,561 posts	larkim Hmm, I thought I'd made it public. Try this one instead - works for me. runalyze.com I've got a red Garmin strap, maybe I'll dig it out for an easy run and see if the HRV data looks different.
SPR Mar 2023 9:14am, 15 Mar 2023 39,831 posts	SPR Yeah worth doing that I think. I seem to have lost optical HRV in the same way I've lost optical respiration recently. Both the Verity Sense and the 255 have had updates recently so either could be the culprit.
larkim Mar 2023 9:41am, 15 Mar 2023 20,564 posts	larkim What should a run's HRV look like? Pretty flat I'm guessing?
SPR Mar 2023 9:49am, 15 Mar 2023 39,832 posts	SPR I don't actually know hence why l've not really paid attention. For a steady run flat, but trending down seem to be what I'd get.
The_Saint Mar 2023 11:04am, 15 Mar 2023 7,027 posts	The_Saint I agree with a exercise physiology PhD student I asked about HRV - fascinating but essentially useless as a performance metric
Oranj Mar 2023 7:32pm, 15 Mar 2023 3,511 posts	Oranj Interesting take The_Saint . Pretty much all of Whoop's USP revolves around HRV Back in the day, my old Polar watch had a "measure HRV" protocol which involved lying down, standing and sitting IIRC, but I never had the time to do it regularly enough to get meaningful results. Having the analysis right there on your wrist in a Garmin, 24 hours a day, has proven useful for me and told me when I'm overreaching (although I usually knew that anyway, I'll be tired and tetchy). GCN tech did a video which I found informative, but only as much as it confirmed to me that HRV is a recovery analysis tool, rather than any use as an estimate of exercise performance. Link to GCN tech: https://www.youtube.com/watch?v=8ZBAoKh89Oc
Big_G Mar 2023 7:52pm, 15 Mar 2023 2,352 posts	Big_G I know not a performance metric, but my Garmin knew I was ill (with Covid, but presumably it didn’t know that…!) before I had officially tested positive. Looking back, although I was feeling ropey I wasn’t overly ill to start with, but I got progressively worse, and it tracked that really well with HRV.
flanker Mar 2023 12:05am, 16 Mar 2023 20,853 posts	flanker I find my HRV is a very good measure of the stress my body is under, both from training and life. It usually predicts the onset of illness a day or two or two ahead of noticeable signs, and more reliably than RHR.
Sam Jelfs Mar 2023 6:00am, 16 Mar 2023 1,317 posts	Sam Jelfs Hmm, I thought I'd made it public. Try this one instead - works for me. runalyze.com I've got a red Garmin strap, maybe I'll dig it out for an easy run and see if the HRV data looks different. I suspect it is junk larkim - the 1ms rmSSD says that you have basically no variance between beats. HRV decreases during exercice, but not that much.