Alcohol consumption before sleep decreases sleep latency, explaining the common use of alcohol as a sleep aid. The full impact of alcohol on sleep architecture is not well understood, particularly the potential cumulative effects of Presleep alcohol consumption across consecutive nights Alcohol before sleep increased the rate of slow wave sleep (SWS) accumulation across all three nights and decreased the rate of rapid eye movement (REM) sleep accumulation at the start of each night. Alcohol also decreased the total amount of REM sleep but did not affect the total amount of SWS each night. Drinking alcohol before sleep substantially affects sleep architecture, including changes to the rate of accumulation of SWS and REM sleep. We show that alcohol disrupts normal sleep architecture, leading to a significant decrease in REM sleep thus, the use of alcohol as a sleep aid remains a public health concern. For each series of nights, participants drank one of the two beverages a mixer only or a mixer plus alcohol (targeting a Brach of 0.08 mg/L), ending 1 hour before lights out Linear mixed-effect analysis and generalized additive modeling were used to examine the effect of alcohol on sleep architecture.
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Saturday, June 28, 2025