HRV Metrics: RMSSD

RMSSD is the Root Mean Square of Successive Differences.

It is a popular and accurate snapshot of the Autonomic Nervous System (ANS) parasympathetic branch and is the basis of our “HRV Score”

  • RMSSD is strongly backed by hundreds of research papers across health and fitness fields. 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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