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2026-07-20 15:10:51 · Translate ·

Heart Rate Variability (HRV): What It Actually Tells You

Heart rate variability has become one of the most talked-about numbers in wellness tech. Athletes track it every morning, executives glance at it before big decisions, and it shows up constantly in productivity and biohacking circles — often discussed with more certainty than the science actually supports. Here's a grounded look at what HRV really measures, how it's...

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