Very little deep sleep recorded sometimes.

[BonnieCauley]

Do others notice this when wearing the fitbit loosely on the wrist at night?

[Clove6060]

I have not noticed a difference is sleep being recorded. But then. I don’t wear it loose at night. 
I want contact with wrist so it records properly.

[Cattracks]

I have wondered the same thing. I wear tight enough that it should make contact BUT I may be shifting during the night. My sleep position may be the issue in that I'm pushing the Sense to the side of my wrist while hand is under the pillow. This will affect contact. Will keep experimenting. Possibility of duct tape to side of bed.....

[Rich_Laue]

I wear my unit so loose that it sometimes flips to under the wrist, and rarely have an issue reading O2 or heart rate. Both of which are used when monitoring sleep. 

I also have moved this thread out of hardware help and into the Sleep discussion. 

[YojanaFitbit]

I also wear my Fitbit pretty loose and I haven't noticed this changes. I do know that you can have little deep sleep if you have insomnia. Since this might be caused by stress, anxiety, depression, poor sleep habits, circadian rhythm disorders (such as jet lag), and taking certain medications.

Since during deep sleep, you become less responsive to outside stimuli and breathing slows and muscles relax; heart rate usually becomes more regular. The thinking parts of the brain are largely offline. Your muscles are very relaxed. You’re not dreaming at all during this time. Your body is doing a lot of rebuilding and repairing. That's why very important check if insomnia is affecting your deep sleep. During this time our body secretes growth hormone, which is associated with cellular rebuilding and repair too.

Work out daily and eat more fiber during the day might help you to get a better score in your deep sleep. Also try to avoid caffeine around 7+ hours before bed. 😉

[TiffanyBecker]

stress during the day, caffeine, alcohol, too hot / stuffy in the room, noise - all these affect your sleep and can reduce the percentage of being in deep sleep