Garmin

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Steve NordRunner Aug 2022 8:40am, 3 Aug 2022 1,761 posts	Steve NordRunner You must have missed something because HRV is calculated from data obtained from the sensor on the back of the watch. That's the first sentence at the beginning of one of the sections here garmin.com
Badger Aug 2022 8:42am, 3 Aug 2022 15,459 posts	Badger Garmin's overnight stats do use optical and use some fairly aggressive averaging and removal of questionable data to produce the HRV values. It's a lot more practical with a full night of data where you are keeping pretty still and the heart rate is low than it is to extract HRV during a run when the HR is higher and there's a lot of arm swing affecting the HR data.
Bowman 🇸🇪 Aug 2022 8:47am, 3 Aug 2022 1,647 posts	Bowman 🇸🇪 It will probably start using optic hr for that for sure?
The_Saint Aug 2022 8:57am, 3 Aug 2022 6,988 posts	The_Saint My question was motivated by trying it (HRV) with the alpha software, which may now be the beta software with the watch alone and not getting anything happening over several nights whereas DC Rainmaker implies that you simply update the software and there is is.
Badger Aug 2022 9:32am, 3 Aug 2022 15,460 posts	Badger Ah, ok, that was not clear from your original post. I have a fenix 6x which has collected the data correctly with 22.76 and 22.80. It is in battery saver overnight with OHR and activity detection still on to collect sleep and HRV. The data show in watch widgets but there is a bug where HRV does not sync via Bluetooth or WiFi, only by wired connection to Express on a computer - maybe that last is the issue?
chunkywizard Aug 2022 12:14pm, 3 Aug 2022 14,635 posts	chunkywizard it works well on the 955
The_Saint Aug 2022 12:39pm, 3 Aug 2022 6,989 posts	The_Saint I have been syncing my Fenix 6 Pro with the laptop and Express just to see if that fixes anything
Badger Aug 2022 6:22pm, 3 Aug 2022 15,461 posts	Badger What do you see in the Training Status widget? It should have updated to show one-word summaries of VO2max, HRV and Acute Load. What firmware version are you running?
The_Saint Aug 2022 10:01pm, 3 Aug 2022 6,990 posts	The_Saint It doesn't show that. The firmware reports 22.80 but I installed the alpha version containing the HRV stuff
Badger Aug 2022 11:46pm, 3 Aug 2022 15,463 posts	Badger Odd. I have 22.80 and it has the HRV. I wonder if it's a missing piece of sensor software? I have BMX 5.0.5 (don't know what that is), WHR 5.00.05, ANT/BLE/BT 6.15, Sensor Hub 20.04