How long does alcohol raise your resting heart rate?
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Mostly for the night you drink. In a 2025 smartwatch study, three drinking evenings raised 40 adults’ average night heart rate from 63.6 to 66.6 bpm. In the three dry days after, it fell back to 64.9, close to where it started.
After a weekend, people often worry the damage will show for weeks, or they decide a high Monday number means nothing because they feel fine. The heart rate rise is real, and it’s also short. Most of it comes and goes with the alcohol in your blood.
What we’d do
Expect a higher number the morning after drinks and a quick return. One dry night shows a lot, and a dry week shows it clearly. If your resting heart rate stays up for a week with no drinks, late nights or illness to explain it, that’s the pattern to look into.
What the smartwatch study did
Researchers in Munich gave 40 healthy adults, average age 30.5 and 63% women, a Withings ScanWatch to wear for nine days. The first three days were dry. On the next three evenings, the women drank 40 g of alcohol (about 2.9 US drinks) and the men 60 g (about 4.3), in any drink they liked. The last three days were dry again.
| Days | Average night heart rate |
|---|---|
| 3 dry days | 63.6 bpm |
| 3 drinking evenings | 66.6 bpm |
| 3 dry days after | 64.9 bpm |
The researchers reported the three days after as one average, so we can’t tell whether the drop took one night or three. The watch’s sleep stages didn’t change on drinking nights, but people rated their sleep worse.
It’s like a stone dropped in a pond. The splash is big, and the water is close to flat again within a day or two.
Why it’s mostly that night
The rise follows the alcohol. In a 2021 lab study of 26 adults, drinks before bed raised heart rate across the night and pushed the nervous system toward its “fight or flight” side, most after the higher dose. Once the alcohol has cleared, that push fades.
In 20,968 WHOOP members, one drink more than usual, against one less, came with a sleeping heart rate 2.4 to 2.8 beats higher that night. Drinking an hour earlier, against an hour later, came with about 0.9 beats lower in women. A long night of sleep after a big evening helped too, by 2.9 beats after five drinks above usual. WHOOP paid for that study.
When your lowest heart rate comes late
Oura’s Readiness score looks at when your heart rate reaches its lowest point in the night and how much sleep you get after that. If that low point keeps landing in the second half of the night, Oura suggests avoiding late meals, caffeine, alcohol and exercise before bed. It also lists alcohol among the things that can raise your resting heart rate, and its resting heart rate score can drop when yours is 3 to 5 beats above your usual.
Test it on yourself
Pick one device and look at its overnight resting heart rate. Note a few nights after drinks and a few dry nights, or take one full dry week, and compare the averages. The Your week tool shows how much of each night your drinks reach.
When will tonight's drinks clear?
Bed at 11:00pm
Mostly cleared by 2:50am
That's about 3.8 hours of your sleep with alcohol in your blood (3.1 to 4.9 if your liver runs faster or slower).
Restaurant pour6 oz, 13.5%, 1.35 US drinks- Restaurant pour6 oz, 13.5%, 1.35 US drinks
REM: More REM lost. Your evening is 0.56 g of alcohol per kg of body weight.
The full clock, with the band, the same drinks two hours earlier and what your heart does.
4 sources
- Strüven A and others, The Impact of Alcohol on Sleep Physiology: A Prospective Observational Study on Nocturnal Resting Heart Rate Using Smartwatch Technology, Nutrients, 2025pmc.ncbi.nlm.nih.gov
- Grosicki GJ and others, Real-world effects of alcohol on heart rate, sleep, and physical activity by age and sex, PLOS Digital Health, 2026 (funded by WHOOP)pubmed.ncbi.nlm.nih.gov
- de Zambotti M and others, Impact of evening alcohol consumption on nocturnal autonomic and cardiovascular function in adult men and women: a dose-response laboratory investigation, Sleep, 2021pubmed.ncbi.nlm.nih.gov
- Oura, Readiness Contributors, updated October 7, 2026support.ouraring.com
