Resting heart rate in perimenopause

What it is

Your resting heart rate is how many times your heart beats per minute when you’re calm and still — most cleanly measured overnight, while you sleep and nothing is asking anything of you. It’s one of the simplest windows into how hard your body is working at rest.

Like HRV, it’s shaped by your autonomic nervous system — the balance between the fight-or-flight and rest-and-digest sides. A resting rate that drifts up, or a heart that suddenly races “over nothing,” is usually that balance tipping, not a sign that something is broken. And as with HRV, there’s no single right number: what matters is your own baseline and how it moves.

How perimenopause changes it

The same hormonal shifts that move your HRV move your resting heart rate from the other side. Even before menopause, wearable studies show resting pulse rises measurably with the menstrual cycle — running higher in the luteal phase, the stretch after ovulation, than around your period (see the research). Across the transition, the lasting tilt toward sympathetic, fight-or-flight dominance can nudge your whole baseline upward, so palpitations and a faster resting rate become common, documented experiences.

This is also why it’s worth watching rather than waving off. The American Heart Association calls the menopause transition a genuine window of cardiovascular change — and a moment for prevention. A racing heart is rarely an emergency, but it’s real and measurable, and it deserves data when you sit down with your clinician. Perigee helps you bring that data; it doesn’t diagnose it.

How your Apple Watch measures it

Your Apple Watch reads your pulse continuously with its optical sensor and calculates a daily resting heart rate from your calmest, most still moments — largely overnight. That makes it a reasonably steady day-to-day signal, more stable than a one-off HRV reading.

Still, it’s an estimate with limits. A late meal, alcohol, a cold coming on, a warm room, a stressful evening, or a poorly fitted band can all lift a night’s number without anything being wrong. One elevated reading tells you little; the shape of the trend across weeks tells you more.

How Perigee reads it

Perigee reads your resting heart rate against your own recent weeks, not a textbook average. A number that’s high for someone else might be perfectly ordinary for you — and a small, steady climb above your baseline is the kind of thing worth noticing.

Every reading comes with a confidence tier, so you always know how much data is behind it. When Perigee is still learning your baseline, it says “building your baseline” rather than pretending to certainty. When your resting rate drifts, you get one plain-language sentence about it — an observation to fold into the bigger picture, and, if it persists, a concrete number to hand your clinician.