HRV Analysis

Measure heart rate variability from RR intervals. Track daily readiness.

Connect chest strap

Heart Rate Monitor

Not connected

This device isn't sending RR intervals. HRV requires a chest strap — try Polar H10, Garmin HRM-Pro, or Wahoo TICKR.

A chest strap is required — most wrist HR monitors don't expose RR intervals via Bluetooth.

Measurement duration

Measure first thing in the morning, sitting still. Longer = more accurate; 3 min is a good balance for daily tracking.

Sit still, breathe naturally. Don't talk or look at your phone.
Results are most accurate when you're relaxed.

3:00

remaining

Heart Rate

RMSSD

— ms

Last RR interval

— ms

Intervals collected

RR Intervals (last 60)

RMSSD

—

milliseconds

Root mean square of successive differences

Readiness —

— SDNN ms

— pNN50 %

— Mean HR bpm

— RR intervals

— Filtered out

— Duration

RR Interval Waveform

Save to your profile — stores result, updates your readiness baseline, tracks HRV trend.