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HRV: Your Body’s Quiet Signal
February 18, 2026
My heart was racing — 130, 140 beats per minute — and it wouldn’t come down. I’d already been to urgent care once. That was day two.
My doctor sent me to the ER for blood work, an EKG, and a CAT scan. Turns out, the culprit was an inflamed gallbladder literally full of sand-like gravel.
They gave me medicine to manage the pain, and about 20 minutes later, my heart rate dropped to 102. I was transferred to the hospital for surgery the next morning.
But here’s what struck me later, when I was recovering and scrolling through my Oura app: my Heart Rate Variability (HRV) had been quietly telling me something for weeks.
My January average had dropped to 18—well below my usual baseline of 24. And in the days leading up to the ER, it had dipped even lower. My body had been signaling distress long before the pain became unbearable.
That number had been sitting there, raising its hand. I just hadn’t known how to read it yet.
What Is HRV, Exactly?
HRV measures the time, in milliseconds, between your heartbeats—and how much that time varies.
Your heart doesn’t beat like a metronome. It speeds up and slows down slightly all the time, responding to what’s happening in your body. And that variation? It’s actually a good thing. It means your nervous system is flexible and adaptive.
- Higher HRV generally indicates that your nervous system is balanced, you’ve recovered well, and you have the capacity to handle what the day brings.
- Lower HRV signals your body is working harder—processing stress, fighting something off, or needing rest.
What makes HRV especially powerful is that it can reflect stress or early signs of illness before your resting heart rate changes. It’s one of your body’s earliest signals.
It’s also deeply individual. My baseline HRV in Oura is around 24. Yours might be higher or lower—and that’s completely normal. What matters more than any single number is the trend over time. Are you trending up after a few nights of good sleep? Dipping after a stressful week? Recovering from a cold?
What Affects HRV?
I’ve been tracking my HRV for about 18 months with my Oura ring. Here’s what I’ve noticed:
Sleep is foundational.
When I get fewer than six hours, my HRV drops noticeably. Prioritizing a consistent sleep routine and aiming for that 7–8 hour window is one of the most reliable ways I’ve found to support it.
My menstrual cycle creates a rhythm. In the first half of my cycle (follicular phase), my HRV tends to run a few points higher. In the second half (luteal phase), it dips slightly. Once I noticed this pattern, I stopped interpreting a “low” day as something I’d done wrong. Sometimes it’s just biology doing its thing.
Stress and recovery time are real inputs. On weeks where I’ve been intentional about restorative time (quiet mornings, getting outside, actual downtime) my HRV reflects it.
And then there’s alcohol. On evenings where I have a cocktail, my HRV drops by 10 points or more. My heart rate goes up. My stress score goes up. My sleep quality goes down, which keeps my HRV lower the next day too. This pattern is well-documented—people who track with Oura, WHOOP, or Apple Watch consistently see a dip after drinking, even with small amounts.
For me, the data has helped me shift towards deliberate choices and habits because I could see what was actually happening in my body.
I now prioritize at least 7 hours of sleep every night. Sleep is where my body recovers, repairs, and makes me feel restored.
I tend to work out harder on my first half of my menstral cycle when I have more energy.
The data helped question why I was drinking, and that clarity led me to cut back naturally—down to once or twice a week. I still enjoy a cocktail or glass of wine, but I’m more deliberate about it now. A glass of wine at the end of a stressful day feels different than a glass shared with friends or family.
Recovering From Surgery
In the weeks following my gallbladder surgery, I focused on the basics: sleep, rest, and recovery. Eight hours a night. Reduced obligations. Let others care for me. Slow down when my body hurt.
A couple weeks into February, my HRV had climbed back to 22 and is still trending up.
Your body is always communicating. The question is whether we’re paying attention.
Devices to Track HRV
You don’t need to become a data nerd to benefit from tracking HRV. Even two weeks of observation can start to reveal patterns that feel personally meaningful. Here are 3 solid options to get started with:
Oura Ring measures HRV overnight during sleep, giving you a stable, consistent baseline. It takes about 2–3 weeks to establish your personal average. Great for sleep-focused insights and trend tracking.
Apple Watch measures HRV periodically throughout the day and night when you’re still. Your numbers may look different than Oura readings (different measurement windows), but it’s still useful for spotting trends.
Garmin (many models) also tracks HRV during sleep and shows a “HRV Status” trend over time. A solid option if you’re already in that ecosystem.
Ready to Experiment?
Try this: For the next two weeks, pick one variable to get curious about. Track and observe your HRV response. Watch what happens. Try not to judge—just notice.
At the end of each week, ask yourself: what is my body telling me? The goal isn’t to optimize everything at once. It’s to move from “I should change this” to “I can see what this actually does.” That shift changes everything.
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