Garmin watch sleep monitor : Hi I’ve recently... - Bridge to 10K

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Garmin watch sleep monitor



I’ve recently started wearing my Vivoactive 3 all the time, and I love being able to check the time with barely a muscle moved. Anyway it’s been collecting my sleep data and I almost never drop into deep sleep - just a few minutes per week, and only on one or two nights.

My question is whether this is accurate and whether it matters if we don’t have ‘deep sleep’?


11 Replies

Google has this to say

if you aren't feeling exhausted all the time, I suspect you are getting enough deep sleep, but I am not a sleep expert (I did have insomnia for a while though)


My Fenix 5S collects sleep data whilst it’s charging the other side of the room! 🤷🏻‍♀️😉

SutshaGraduate10 in reply to Ripcurlrana71



When I was getting odd heartbeat results, I was told that my Garmin would learn as I gave it more data and it does seem to have settled down to something that I feel is realistic. I've only worn it a few times whilst sleeping and it seemed to be the opposite of yours, telling me I'd slept more than I knew I had 🙈


Unless you're feeling really knackered or have never really felt that you get "restful" sleep it's unlikely to be correct.

Deep sleep is restorative sleep and very necessary. I can tell when I wake if I've had less than an hour in a night without checking the app. 1.5hrs is ideal for me. Under 60 mins and I feel dead.

See if it settles down. If you do feel that you've never really gotten good sleep it may have highlighted a sleep issue...


I was looking at information about the garmin watch when I got mine. It says for more accurate readings you should wear it all the time . So if you've just started doing this give it a week or so and see if your readings change.


Thank you all. I hadn’t even considered how I thought I’d been sleeping, but in fact although I had a couple of nights terrible insomnia I have mostly been sleeping okay and feeling fine the next day.

All bets are off now, because I’m now on antibiotics for cellulitis and feel rubbish, but I’ll wait a few weeks and hope it looks less alarming.

It’s great to have so much expertise at the tap of a keyboard.


Hi. I have the same watch and it is entirely not accurate. It used to register me as being asleep from when I crashed on the couch at the end of the day and claim that I slept through to when I got up the next morning. This would be despite a couple of trips to the loo, getting up to brush my teeth, going upstairs to go to bed and reading for up to an hour once I was in it. The fact that the sunlight streaming in through my bedroom window tends to mean I'm awake (if not especially alert) for about an hour before I get up also seemed to pass it by.

The sleep monitor and the VO2Max calculator are probably the watch's only two weaknesses; and since I already know I'm a terrible sleeper, and I hadn't even heard of VO2Max until I got the thing, I don't let either keep me awake at night.

Oh... Wait...

LizzisforlivingGraduate10 in reply to sTrongFuse

Thanks - I’ll stop looking at this data, then. I did wonder about VO2 Max because I’ve only ever had one reading, it never changes.

I like the basic functions of my Vivoactive 3, though.

Happy running! Xxx

sTrongFuseGraduate10 in reply to Lizzisforliving

I really like it for everything else. The fact that it looks like an actual watch more than a fitbit was a big plus in its favour.

Heart rate zones when running can also be a bit hit or miss, as it sometimes locks on to footfall rather than pulse, but again, I tend to always just go by how I'm feeling rather than what it's telling me.

It is great for letting me know how far and how long I've run, I like being able to set it to tell me when I'm going faster than I should be, I love being able to control the music on my phone from it without having to fish my phone from my pocket. It gives me all the stats I actually need, so the ones that it falls down on, I can happily live without.

LizzisforlivingGraduate10 in reply to sTrongFuse

Me too, I love mine. Just exploring new functions, but if they don’t add anything that’s fine. Xxx

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