29 chronicles
Numbers, Decoded
Clear, physiology-first explanations of HRV, resting heart rate, sleep stages, VO2 max, and ECG alerts—what the numbers mean and when they don’t matter.
Aug 15, 2026
Your Watch Says You Slept 6 Hours. Here’s Why You Feel Wrecked
The watch reports decent sleep hours yet you wake up exhausted. Here’s why duration alone misleads and which signals act...
Aug 14, 2026
HRV Is a Trend, Not a Score: What That Number Actually Tells You
Your watch gives HRV a daily grade. That’s the wrong way to read it. Here’s what the number actually measures, why singl...