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If I can be arsed I look at the HRV data dervied from a running activity recorded on my 935 whilst wearing a HR strap (since the optical monitor can't get it).
I think you had to enable something to tell the 935 to record HRV data. Yep:-
Settings -> Physiological Metrics -> Log HRV -> OnGarmin Connect and Strava do nothing for displayin HRV info but uploading those files to runalyze.com will give you some info.
This is a more specific analysis than the generic "how knackered are you" info that the Garmin will give you if you do:-
Training Status and Scroll down to the "Recovery" page which tells you how long it'll be to recover.But none of this gives you general "you're knackered" based on your current HRV as it's just relying on data from your previous activities, and most of that is based on estimation of whether your recent load is too much or not.
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Greenbank
ewanmac
How are people measuring HRV? I tried it for a while using my Garmin 935 where the protocol was to stand still wearing the HR strap for about a minute just after getting up. I tried it for a couple of months and got basically no signal in the data... I can’t remember the actual values but I never got out of the “most rested” category even after a heavy week or the morning after a HIM tri. So I gave up.
However I’ve been considering a whoop and I thought one of the advantages is that it measures HRV 24/7 rather than a single daily measure. My garmin does also record HRV continuously using the optical sensor however I always thought the optical sensor (in my watch at least) was a blunt tool for measuring HRV and that the whoop uses a higher frequency optical sensor specially designed for HRV. Using the continuous garmin HRV, anecdotally I do see some correlation with my perceived stress... for example I can easily see a spike in stress during the point where I had an argument with my fiancé a few days ago. One of the key features of whoop is that it is supposed to give a score that would tell you when to train and when to rest, but looking back over the past few weeks of garmin data I don’t get anything like that... as with the once daily measure, my overall stress score barely ever even get into the low stress category. Maybe I’m just super chill, or having a desk job provides ample opportunity to rest but overall I get so little information from HRV that I don’t find it useful at all. But I was wondering about trying whoop to see if I get better results with a dedicated device.