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Sep 2022
4:05pm, 24 Sep 2022
14,884 posts
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chunkywizard
RH look in your Bluetooth settings on your phone. You should see all connected devices. Is there a Garmin listed there that isn’t your current one? Or is your current one listed twice?
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Sep 2022
4:47pm, 24 Sep 2022
26,547 posts
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Rosehip
No other Garmins - but oddly a Ford Transit! I have told it to forget that 
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Sep 2022
10:59pm, 29 Sep 2022
38,386 posts
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SPR
Does anyone know for sure how newer Garmins auto detect max HR (one that hasn't been reached). I'm assuming fitness age and the 220 formula but I've not had my 255 long enough to actually be shown a fitness age.
Mine was auto detected at 191 on my first run with the watch but was auto detected at 193 today. In both runs I got nowhere near that. No change yesterday when I reached 180 doing some intervals.
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Sep 2022
11:15pm, 29 Sep 2022
1,969 posts
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Steve NordRunner
No, auto-detect detects HR actually reached during an activity. If you look at the activity in GC, click on the HR graph to get landscape format, then pinch out, you can zoom in to be sure it wasn't momentary noise or a spurious reading. If a setting is turned on it will update your maxHR setting.
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Sep 2022
2:06am, 30 Sep 2022
20,718 posts
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flanker
It doesn't seem that simple any more. Twice mine has updated Max HR on recovery runs recently where the HR has been nowhere near the proposed max. Doesn't appear in the graph or summary. I've even checked the fit file for anomalies that don't show up in the run stats and can't find any.
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Sep 2022
7:55am, 30 Sep 2022
38,387 posts
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SPR
Yes as flanker says I'm 100% sure I wasn't anywhere near that HR. All activities show your max HR so there would be no need for zooming in.
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Sep 2022
7:59am, 30 Sep 2022
1,972 posts
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Steve NordRunner
My new farmin Epix behaves as described in https://www8.garmin.com/manuals/webhelp/GUID-E5C62F3F-DCE3-4197-8CA5-E419B2A55D12/EN-US/GUID-0EDC68E3-D886-48D2-B624-AA634739B421.html. Soon after I bought it, it did prompt me to raise my max a couple of beats, and on inspection of the traces it was probably right. If there are changes since, I can't say what they are since I can't find a maker's description. If the feature were giving suspect readings I would turn it off.
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Sep 2022
8:00am, 30 Sep 2022
1,973 posts
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Steve NordRunner
Ps the zooming in was to check whether you believe the reported max.
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Sep 2022
8:11am, 30 Sep 2022
38,389 posts
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SPR
It's not that it's giving suspect readings, it's that it isn't clear how it's doing it. I'm pretty sure my max is higher than the number it has come up with (it's actually reducing the max I had on the watch). I'm guessing they've tried to make it smarter but there's no documentation of how.
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Sep 2022
8:11am, 30 Sep 2022
14,910 posts
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chunkywizard
As I understand it an activity doesn't have to get near max HR for the watch to suggest a new Max setting. It's the black magic from FirstBeat. I guess it is using HRV and a lot of maths. I am not sure if it works but I've left it on and it's settled on a value and my VO2Max and Lactate Threshold seem ok.
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