HRV Metrics: RMSSD

RMSSD is the Root mean square of the successive differences – used for a good snapshot of the Autonomic Nervous System’s Parasympathetic branch and is the basis of our “HRV Score”

  • RMSSD is strongly backed by research and is considered the most relevant and accurate measure of Autonomic Nervous System activity over the short-term. Here are a few studies referencing its use:
  • More research about the use of RMSSD can usually be found on PubMed, ScienceDirect or other research libraries.

For healthy individuals ages 25-74 years, the range is 7.3-65.7. You can find your specific healthy range in the Population Comparison feature of the app!

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