What counts as a meaningful HRV drop?

A drop only matters when it falls clearly below your own typical range and either has an obvious cause (alcohol, short sleep, hard training, illness) or persists for several days. A reading inside your normal range is just noise.

Can I compare my HRV to someone else's?

No. Healthy people the same age differ by 30–40 ms for reasons unrelated to health, and devices use different metrics (Apple uses SDNN, most others use RMSSD). The only useful comparison is your number versus your own recent baseline.

Tool

Is this HRV drop signal or noise?

You woke up, your HRV is down, the recovery score is red. Before you reorganize your day: a single low reading is usually just noise. This tool converts “my HRV dropped” into a within-person verdict — compared only to your typical range, never to a target, a chart, or anyone else.

Your typical overnight range

From your app’s 7-day average — roughly your normal low and normal high. Not a target; just where you usually sit.

Normal low

Normal high

Last night

Your device

Anything from yesterday? (optional)

Enter your typical low, typical high, and last night’s reading to see whether this is noise or signal.

It never prints a “good” HRV number, because there isn’t one — the honest signal lives in your own trend. For the full picture — how to read your baseline, what suppresses HRV, and what actually raises it — see the HRV guide.