🧠💤⬇️

#SWS #deep sleep #delta waves #brain activity #sleep stage #non-REM N3 #slow brain waves #sleep depth

📊📉📈😴

#sleep graph #hypnogram #sleep tracking #sleep analysis #sleep depth #sleep quality

⌚️📈📉💤

#sleep tracking #sleep graph #sleep data #sleep analysis #sleep monitor #sleep quality #sleep depth