Alcohol, Resting Heart Rate, Heart Rate Variability and Sleep

Ever since I got the Oura Ring, I’m able to track my deep sleep, heart rate variability and my resting heart rate in a more accurate fashion. Heart rate variability is the time interval between heartbeats. Typically, the higher the HRV, the better. The Oura ring is able to measure this by measuring your HRV while you are sleeping at the same time of the day, which makes the readings more accurate than other devices like the Apple watch or FitBit.

A lower resting heart rate during sleep is also associated with good recovery and health.

On normal days, my deep sleep, HRV and resting heart rate is relatively good and consistent and my Oura Ring’s readiness score is not too bad. It’s not optimal because my weeks vary in terms of training and other activities.

What’s interesting is how alcohol affects my readiness score. In the past, I wrote about how drinking can destroy my sleep quality. Now that I am tracking my sleep with the Oura ring, it’s clear that even 2-3 drinks in the evening can affect my HRV and resting heart rate when I’m sleeping. Even when I drink those drinks 3 to 4 hours before I actually sleep and I feel 100% sober with no feelings of even a slight buzz, I wake up with a lower than ideal readiness score. A low readiness score is associated with me lacking deep sleep, a low HRV and higher resting heart rate.

This is a wake up a call for me to reduce drinking even more, especially binge drinking on weekends. Sleep is one of the most important thing you can do for recovery of your mind and body and now that I can see how even light drinking can impact your sleep, I will put in more effort in more often staying alcohol free.

When my Oura ring registers more deep sleep, have a lower resting heart rate + higher HRV, I typically feel better and more rested that day. It may be the placebo effect, but whatever it is, trying to keep those numbers consistently good is the goal.

What I notice is when I drink earlier enough to sober up and fall asleep, my RHR and HRV are much better. What happens is if you go to sleep drunk or buzz, my HRV remains low as my RHR remains high. If I am able to sleep through the night and stay asleep it normalizes a bit towards the morning.

How it looks when I go to sleep drunk or buzzed
The HRV (top chart) begins very low, then rises as morning approaches. The RHR begins high and takes quite a while to drop.

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