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
August 2, 2026
Night Wakings and Morning Stress: Why a Broken Night Leaves You Waking Up Wired — and How Long It Takes to Settle
Wake up tense before anything has happened? A broken night leaves your body measurably more stressed the next morning — through cortisol and lost deep sleep. Here's the science, the Welltory data, and how fast it settles.
August 2, 2026
Insulin Resistance from Sitting and Bad Sleep: Why It Happens, and How Reversible It Really Is
Two of the biggest drivers of insulin resistance are ordinary and fast-acting: not moving enough, and sleeping badly or on an inverted schedule. Here's the mechanism — and a realistic timeline for turning it around.
August 2, 2026
Cellulite Isn't a Flaw — It's Anatomy: Why Marketing Sold Women a "Problem," and What Actually Helps
Cellulite isn't a toxin, a flaw, or a sign of being unhealthy — it's normal anatomy that 80–90% of women have, including athletes. Here's the real tissue science, why men mostly don't get it, and what sleep, stress, and movement can and can't do.