Tatsiana Yashyna
Deputy COO at Welltory
Deputy COO at Welltory. With a background in medicine and years of working with health data, she translates research and real physiological signals — sleep, stress, heart rate, and hormones — into clear, evidence-based explanations that help people understand what their bodies are telling them.
Latest articles
When a good HRV reading is not good news
Higher heart rate variability is usually read as better recovery. In energy-limiting conditions that reading can mislead — and almost no app warns you about it.
How accurate is HRV from a phone camera?
Camera, wrist, ring or chest strap — accuracy depends on where the sensor sits and whether you move. What the validation studies found, what they left out, and how to check your own.
Nervous System Snapshot
A reading of your autonomic state at a single moment: how activated your nervous system is, how easily it settles, and how well its two branches are working together.