GoKawiilOura adds Cardio Effort and VO₂ max tracking to its smart ring app
Oura announced two new workout metrics rolling out to Ring Gen3 and later models: Cardio Effort, which measures how much a workout taxes the cardiovascular system relative to a user's baseline, and VO₂ max, which estimates how efficiently the heart, lungs and muscles use oxygen during exercise. Cardio Effort is broken into per-workout and weekly totals, with the weekly score categorized from 'Light' to 'Reaching' based on personalized heart-rate ranges.