This section introduces measurement-first workflows, live data, baseline tracking, and related posts.
Latest Posts
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Why using Heart Rate Variability in Heliobiology?
Key Takeaways Heart Rate Variability (HRV) measures beat-to-beat changes in heart rhythm and reflects the state of the Autonomic Nervous System (ANS). HRV was…
Measurement-First Notes
Use this section as a stable introduction page first, then follow the latest section posts below for updates and deeper practical guidance.