I've been using the Zeo about 6 weeks and find I'm in the 16-22% REM sleep range while almost always being under (sometimes WAY under) 5% for deep sleep. I'm a 66 yo female and have PLMD which causes many more wake-ups than the Zeo can count!
Thursday night my "sleep hygiene" was unexpectedly thrown completely off when I had to stay up all night due to a tsunami warning and evacuation (Hawaii). Around 5a I finally got to sleep for a little under 3 hours. The state was still in emergency mode at that time but I just couldn't stay awake any longer. Understandably, my sleep pattern was interrupted. My deep went up to 7% (surprise #1) and my REM plummeted to 3% (surprise #2). I didn't feel too badly yesterday but started fading fast beginning later in the afternoon. Last night I went to bed about 1.5 hours earlier than normal and woke up at approx. my normal time. This morning deep was at 5% (30 min...the most I've logged on the Zeo) and REM was at 7% (42 min.). I expected to feel the add'l deep minutes in a positive way. Didn't happen! Today I'm exhausted and just realized my body might be in something analogous to jet leg.
My questions are...Can lack of REM cause this feeling of exhaustion even tho' my deep was slightly higher than I'm used to? Is REM naturally impacted more than deep by stressful events/adrenaline?
While I didn't anticipate the ability to be able to monitor my sleep during an emergency, it's been fascinating to do so. I just don't know how to interpret it.