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Test HRV

A Garmin app that measures HRV(Heart Rate Variability) in a 3 minute test. Saves the output as a Connect IQ activity.

TestHrvDemo

Link to the Garmin Connect IQ app store.

Measurements

  • HRV (Heart Rate Variability)
    • RMSSD - Root Mean Square of Successive Differences (beat-to-beat intervals)
    • pNN20 - % of successive beat-to-beat intervals that differ by more than 20 ms
    • pNN50 - % of successive beat-to-beat intervals that differ by more than 50 ms
    • beat-to-beat interval - reading coming directly from the watch sensor
    • HRV Successive Differences - difference between current and previous beat-to-beat intervals
    • SDRR - Standard Deviation of beat-to-beat intervals
    • HRV RMSSD 30 Sec Window - RMSSD calculated for consecutive 30 second intervals
    • HR from heartbeat - beat-to-beat interval converted to HR
  • HR (Heart Rate)
    • minimum
    • average
    • maximum

Viewing Results in Garmin Connect

Results are saved as a Garmin Connect activity category Other named Test HRV: TestHrvActivity

The summary data is saved under Stats, section Connect IQ:

SummaryStats

The extra graphs are shown next to the built-in Garmin graphs: Graphs

Requirements

  • Connect IQ 3+ compatible device that tracks Heart Beat Interval data
  • Measurements taken from the built-in optical HR sensor on the watch
    • For reliable readings minimise wrist movement
    • No strap required
  • HR straps not supported
  • The app starts measurements automatically as soon as stable sensor readings are detected

Dependencies