Holmer, three drinks before bed cut REM and wreck late sleep

Alcohol close to bedtime front loads your deep sleep and then takes it away later in the night. That is the finding Brady Holmer pulled out of a study he shared, and he sums up the pattern in one line.

The protocol was blunt. Three standard drinks, targeting a blood alcohol concentration of 0.08, finished about an hour before lights out, three nights in a row. According to Holmer, the result was deep sleep early, less of it later, less REM overall, and more wakefulness toward morning. He wrote about the study and posted the summary himself.

Brady Holmer

@Brady_H

X

You get deep sleep early, less of it later, less REM overall, and more wakefulness toward morning.

Why the back half matters

REM (the sleep stage associated with dreaming) is the piece that takes the hit across the whole night, not just one window. The deep sleep is not missing either, it just gets shoved to the start and then goes quiet. So a night that starts out heavy can still end with you awake at five in the morning wondering why.

That is the part worth sitting with if you track your sleep. Total hours can look completely normal on a watch or a strap. Time in bed is time in bed. But Holmer's description of the study says the shape of the night changes, and the shape is what a recovery metric is trying to approximate in the first place.

What it actually means

This is three drinks in quick succession, aimed at a specific blood alcohol level, right before bed, on three consecutive nights. That is a real dose on a real schedule, not a glass of wine with dinner at seven, and the study as Holmer describes it does not tell you what the smaller version does. Nobody in the source is telling you to quit drinking.

What it does give marathon and ultra runners is a reason to stop reading the headline number on the sleep app. If you drink late in a hard training week and your total sleep looks fine but your legs do not, the second half of the night is the first place to look.