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How does the device know when you fall asleep?

ANSWERED

‎03-02-2015 05:44

‎03-02-2015 05:44

... as the title suggests?

 

I ask, because on the first night I wore it, it said I took 9 minutes to fall asleep, but it was a lot longer than that. At least an hour. I'm not usually a fast sleeper.

 

Second night, it said 7 minutes. Which was proabbly a lot more accurete, considering I'd been out and was blind drunk. Surprised I actually rememebered to put the thing on!

 

Is it the point at which you stop moving (which I would feel a bit inaccurate, as I don;t move much while I lay awake) and if so, is this going to skew the sleep efficiency statisitcs?

 

Thanks!

P.

 

 

 

 

 

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Accepted Solutions

‎03-02-2015 06:44

‎03-02-2015 06:44

It's based on movement, so if you're completely immobile while trying to fall asleep, it may think you are actually snoozing.

I'm an ecommerce and online business consultant who sits most of the day. Getting off my butt with a Fitbit Flex since 12/2014.

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2 REPLIES 2

‎03-02-2015 06:44

‎03-02-2015 06:44

It's based on movement, so if you're completely immobile while trying to fall asleep, it may think you are actually snoozing.

I'm an ecommerce and online business consultant who sits most of the day. Getting off my butt with a Fitbit Flex since 12/2014.
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‎03-05-2015 06:56

In response to PamelaHazelton

‎03-05-2015 06:56

@PamelaHazelton wrote:

It's based on movement, so if you're completely immobile while trying to fall asleep, it may think you are actually snoozing.

I agree with this. Sometimes when I watch TV on the couch just before bed, Fitbit thinks I'm already in bed/asleep because I don't move around much.

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