Alcohol intake can lead to brief, unremembered awakenings throughout the night, resulting in feeling unrestored.

“the second issue with alcohol is that it fragments your sleep so it will litter your sleep with all these punctuated Awakenings throughout the night the danger that is that many of those Awakenings with alcohol you don't remember because they're too brief but then you wake up the next day and you think well I didn't have a problem falling asleep I didn't have a problem staying asleep but I just I feel rough I just don't feel restored by my sleep and you don't add two and two together”

“Alcohol will actually have you waking up many more times throughout the night. So your sleep is far less continuous.”

“Alcohol both fragments your sleep as well as reduces REM sleep. Meaning, you wake up more often during the night and will likely feel unrefreshed and unrestored when you get out of bed.”

“alcohol is actually very good at blocking your dream sleep your rapid eye movement sleep and so what happens is that you end up waking up the next morning feeling unrefreshed and unrestored by your sleep”

“within the night however the second part of quality is just having continuous sleep with as few awakenings as you can that's where alcohol is vicious it will litter your sleep with numerous awakenings”

“no actually first of all you're never getting down into deep sleep you're basically vacillating between non-rem light and one-minute wake-ups where you're not fully awake and conscious but you're actually even probably out of theta waves and you're just sort of bouncing back and forth between god knows what maybe alpha theta alpha theta alpha theta something like that”