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Which is more accurate; normal or sensitive?

I have tracked my sleep for two nights so far.  Both nights, in normal setting, say I slept about 6.5 hours, with many interruptions or restless/awakened times.  17 x the first night and 20 x the second night.  I switched over to Sensitive setting and looked at the graph ---- WOW!  It says I really slept for a mere 3 hours and 39 minutes and was awakened 10 times.  Last night, I was lying awake for a long time...I remember it clearly because I actually got up and went downstairs to get two sleep aid pills.  I couldn't stand it anymore and was sick of just lying there awake!  In the normal mode, it doesn't reflect that.  In the sensitive mode it clearly shows I was awake for the time frame I remember being awake.  However, I have no idea how I can function ( went to work) on 3 hours and 39 min. of sleep, interrupted to boot!  Your thoughts on these two settings pretty please and thank you!  

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I would like to know also!!  Significant difference in sleep tracked with these two functions.

Megz79
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One of the biggest reasons I wanted a Fitbit was for the sleep tracker.

 

For the first 3 or 4 days I had mine set to normal and I was seeing 80-95% efficencies with 25-40 minutes of restlessness. I noticed that according to the graph on the iPhone Fitbit App that I hadn't "awaken" at all even though I specifically remember opening my eyes a few times to move into a more comfortable position. 

 

One night I set it to sensitive and I got a really low efficiency and only 4 hours of sleep. I didn't feel like I got such poor sleep, I actually felt really good when I woke up. That was the only time I had it on sensitive and I've been using normal ever since.

 

As weird as it might sound, sometimes if you see that you have "poor sleep" according to a graph then you start to feel like you got poor sleep, even if you actually got great sleep. Our minds are very powerful that way. So I choose to use normal because it does show the amount of times I'm restless (which I know is true because I remember moving in the night but I fall back asleep quickly) and it says I get 7-8 hours of sleep a night which reflects how I feel each morning.

 

I think the reason there are two settings is because everyone is different. For me, normal setting is better. 

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