3 ms·

How do you know?

• formerly_proven 2y ago
  Health > Heart Rate Variability > Show All Data lets you see the exact timestamp and source for any stored data point. And for HRV specifically it will give you the list of millisecond-timestamped heartbeats it considered for that measurement as well.
  • gloflo 2y ago
    But how do you know that this is (more) accurate?
    • dyauspitr 2y ago
      Because HRV is the most reliable after parasympathetic activation in a nutshell. You can look it up for a better explanation.