Research
The evidence, written plainly.
Short pieces on the studies behind each rule in the plan, and on the claims the category makes that the evidence doesn't support. Every article carries the grade its sources earn.
Aug 2026 · 5 min
Resting heart rate: the free recovery metric you already wear
What normal looks like, what moves it overnight, and why a week of mornings beats any single reading.
MeasurementSkol & Hati