today we're going to cover a lot but i want to start by talking about something that humans
just need we lust for it crave it even and we'll do it anywhere the bed the sofa the car
hell even on the beach it's something that we can easily take for granted and yet getting enough
of it can lead to a healthier happier lifestyle it's sleep today we're going to talk about sleep
tracking on the galaxy watch 4 classic i've done many little tests of the galaxy watch 4 accuracy
over the last year since its initial release and what i really want to do now is bring a
better quality slightly more thorough test to the table and really hone in on those sleep tracking
functions because a lot of reviewers do tend to miss that out now i have discovered something
pretty horrifying if i'm honest and reluctantly i will share it with you towards the end of the
video so stay tuned for that but now let's take a look at the galaxy watch 4 classic and
the o2 ring from well you so before i show you the test results let's take a closer look at the
galaxy watch for sleep functions and take a look at the o2 ring which is a medical grade device
used for measuring o2 levels so let's begin with the o2 ring you might not be as familiar with this
one the blood oxygen sensor in this is medically certified so this will very much be our baseline
for the testing and what it also does is vibrates to turn you over if you start snoring for example
now there's a couple of key differences which make the o2 ring better all round for these sorts of
tests first being it uses transmissive measuring whilst most smartwatches measure by reflection the
sort of measuring the o2 ring uses is what's used by doctors and in hospitals so it's very reliable
and very accurate and again medically certified that's not the only reason it's more accurate
as well it also records data every four seconds which will give you a more accurate histogram
of what's going on while you're asleep and lastly it can also store up to 10 hours of continuous
measurement data and all that data gets put into the app which will allow you to export it and take
it to your doctor if needs be so the galaxy watch says it will give you sleep insights by measuring
your blood oxygen and snoring it does this actually by using your phone as well so the idea
is you have your phone nearby when you're wearing your watch to bed and your phone will record any
moments it thinks you are snoring that along with the blood oxygen monitoring from your watch will
give you some really great insights into what's going on when you're asleep and it'll tell you
for how long you've been in a deep sleep a light sleep rem sleep or even a weight so again before
i share my results let's do a quick accuracy test comparing the galaxy watch 4 to the o2 ring just
to see how accurate the galaxy watch actually is in that department so i'll be really quick
with this as you can see first test is pretty much bang on let's go again yep also within
one unit which i think is a really good margin for error i think you can safely say that the galaxy
watch is accurate enough in this case but we'll get some better insights into how accurate it is
overnight when we compare it to the o2 ring across maybe six to eight hours or so of sleeping
okay so it's the next morning and coincidentally i've had the worst night's sleep that i've had
in weeks possibly even months it was just such an awful night but a good one for testing nonetheless
so it's about 8 30 a.m usually i'm up at about six but because i had such a bad night's sleep i just
i just lay in so let's see what the galaxy watch has been telling me and what the o2 ring has been
telling me apparently i did 169 bicep curls at 11 40 p.m hmm okay so it's saying that i got
six hours and 59 minutes of sleep which isn't true i don't i don't think that i got anywhere
near that i think i was actually awake from around 10 o'clock all the way up until 2 o'clock
just trying to get to sleep um it has put a gap where i got up and got some water and stuff but
yeah i'm not quite sure if it's quite got the time i was actually sleeping for right maybe it's gone
off when i put my phone down to rest maybe that's what it's using there so what else will it tell
me so actually it's quite interesting it tells me that i burnt 491 calories in my sleep last night
54 minutes awake apparently 57 minutes rem sleep and then four hours and 15 minutes in a light
sleep and then it's saying i got 53 minutes of deep sleep again i am seriously sort of doubting
this i really don't think i got that much sleep at all the other thing that's interesting is that
it's saying that my blood oxygen was under 90 for one minute and 44 seconds um never had my blood
oxygen go that low to my knowledge uh and it's also saying that i was snoring for 18 minutes
um obviously i wouldn't know but i think the best thing to do now is to sort of cross-reference this
with what the o2 ring was saying and see if we can sort of work out what's going on here
okay so obviously this device works a little bit differently this is also going off from when i
put the o2 ring on in terms of o2 drops it isn't saying that my o2 levels dropped below 90 in fact
it's saying that they were the lowest spo2 rating was 93 and if i go into the other session it's
also saying again here it's saying the lowest spo2 was 94 so this isn't telling me that my o2 levels
dropped below that 90 that the galaxy watch is saying so since it was only for a minute or so
perhaps that was some sort of error or just maybe i was like lying funny on my galaxy watch i i
don't know so yeah i think what we're gonna do is just get on with my day again and then we're gonna
check back tomorrow and hopefully i would have had a better night's sleep oh it is actually a couple
of days down the line i didn't want to keep coming back every day because it would make the video so
long and it's a lot of the same thing but i feel like i've had a couple of nights of better sleep
so we're gonna take a look at samsung health and see what it's actually telling us about my sleep
patterns so the most recent night i've had it's saying that i got six hours and 24 minutes of
sleep which isn't actually that long i'm pretty sure you're meant to get at least eight hours
i never seem to be hitting that eight hours mark which is a little bit worrying now something that
i didn't notice earlier was actual sleep time so it says that i was actually asleep for six hours
and four minutes um so yeah quite well under the eight hours you're meant to be getting
and then it also says i burnt 450 calories what's interesting about this although i got less sleep
i actually felt a lot more refreshed after this and i think that is because i had a lot more
deep sleep so it's saying here that i got one hour and 22 minutes of deep sleep as opposed to
well under an hour the other day i think i only had 11 of my sleep as deep sleep it also says that
my blood ox gym was under 90 for over two minutes now um i don't think that's particularly a problem
and then also says for 11 minutes i was snoring so if we go back to uh the day prior to that i got a
bit more sleep so it says i got seven hours and five minutes actual sleep time was six
hours and 39 minutes calories burned just under 500. um but the interesting thing about this is
that i only had 39 minutes of deep sleep which is really really interesting but this day was when i
discovered something absolutely horrifying um and i will show you later on in the video but
it's so bad that i actually think i'm gonna have to go to the doctors about it it's just awful but
also on this day it says my blood oxygen was only under ninety for nine seconds so uh improvement
on that front compared to other days so i'd say that i've learned quite a lot over the past few
days but i did mention at the start i learned something pretty horrifying about myself that
i've been a bit reluctant to share with you but i'm gonna do it anyway listen to this
no that wasn't a gun going off that was actually me i wasn't even aware that i snored let alone
aware that i was actually a semi-automatic rifle i mean wow that is just horrendous it's actually
kind of embarrassing as well so yeah although i didn't want to hear that ever the galaxy watch
for alongside samsung health is pretty damn good it gives you some really solid insights
into what's going on when you're asleep all jokes aside i actually genuinely like that it records
moments like that because i genuinely would never have known and although you're making a really
loud annoying noise what's actually happening when you're snoring your body is not getting
enough oxygen which can lead to some pretty serious health issues so yeah i think i'm gonna
do something about that and maybe take this data to my doctor and see if i can work something out
now the columns the blood oxygen monitoring as we already saw wasn't quite as accurate as we could
have hoped for now i don't think everyone is going to be wearing an o2 ring and the galaxy watch 4.
i think what you need to do is wear your galaxy watch for if you already own one
see how your sleep is going and if you are seeing problems maybe then invest in an o2
ring to get those accurate results so you can export that data and send it to your doctor so
the watch 4 is fantastic i'm really impressed with it there is so much to explore with it but
the galaxy watch 5 pro is just around the corner so if you want to find out all the latest news
on the galaxy watch five pro click the link in the top right corner now for now though i've been alex
this has been take it easy thank you so much for watching and i will see you in the next one