AIBU to be confused by fitbit testing heart rate?

[Aberforthsgoat]

I’ve been monitoring mine a bit closer recently as it turned out to be a good indicator of pregnancy (elevated). It’s come down a teeny tiny bit yesterday and today - but what I’m confused about is that it gives me a resting heart rate of 69 but looking at the chart, my heart rate didn’t drop below 71 all day.
Is it worked out on an average? I’ve read their summary as I was curious (I love data!) but it doesn’t really explain in any detail.

Is it because I don’t wear it at night?
I was, but I would wake up feeling okay then see how little sleep I had and end up suddenly feeling tired because I knew how little sleep I’d had! so I take it off at night now, despite being fascinated by seeing how restless I am!

Does anyone else have a similar thing heart rate wise or can shed any more light on how it’s calculated?

I think it will be reading your heart rate as zero during the night so it’s making your average lower, even if your not wearing it, it still records

With the sleep sometimes I feel better if I’ve had less sleep for some reason

You need to wear it all the time for a true average for resting HR. Since you’re resting a lot at night then it will of course make a difference if it’s taken off all night.

Mine (on Fitbit) gets down to 56-57 just sitting in meetings, but then insists my resting HR is 60-61 on the same day. I dunno how the algorithm works that out, either.

@babooshkar I realise it will make a difference as it’s not getting a true average I just wondered why it would be showing a lower figure than it actually got to all day.

Interesting about it recording zero when I’m not wearing it.

@yeoldetroute similar to me then, just the other way around!

just realised the typo in the title 😫

If you mostly wear it when you aren’t actually resting, it will guess your resting heart rate based on your heart rate while active. It’s just a guess though, based on Fitbit’s algorithm and not anything specific to you, so if you want more accurate data you really do need to wear it at night.

If seeing your sleep data bothers you, you can hide that on the app by clicking edit.

it is guessing that your heartrate gets lower at night and adjusting accordingly. I can predict ovulation on mine as my resting heartrate goes up the day before and stays up until my period is due. Very handy so I suck up wearing it at night

Yes I agree with squeee - it's assuming your heart rate at night is lower than in the day.

I've noticed how my heart rate coincides with menstrual cycle too - raises slightly before ovulation and then drops again just after starting period. I track basal body temperature too and the correlation is very pleasing! 😊

I sync mine at night for this reason. If I did it in the morning my tiredness level all day would depend on what the app said. Now I don’t know til bedtime anyway! Alcohol is the biggest factor in raising my resting heart rate. And weight gain/loss.

Btw you can delete the sleep bit off your dashboard on the app of it helps