Cardio and recovery

Readiness score

Also called Recovery score, Daily readiness

A readiness score is a wearable's single daily number that blends sleep, resting heart rate and heart rate variability into a guess at how recovered you are.

Brands use different names and secret formulas, and peer-reviewed studies have validated many underlying sensors more than the composite score itself. The useful move is to read your own trend on one device, not to compare Whoop, Oura and phone scores as if they used one scale.

General information, not medical advice.