Oura Ring adds cardio effort and VO2 Max metrics

Oura has updated its smart rings with two new cardio‑related metrics. The updates add Cardio Effort, a measure of how hard a user’s body is working during activity, and VO2 Max, an estimate of aerobic capacity. Both features are now available without manual input. They are part of the company’s effort to provide a fuller picture of health data.

Cardio Effort measures workout strain

Cardio Effort uses the Training Impulse method to gauge strain. It assigns five ranges—light, fair, maintaining, building and reaching—to compare a week’s activity to a person’s baseline. The metric helps users see long‑term trends in cardiovascular effort. It is displayed in the Oura app after each workout.

VO2 Max estimation now runs automatically on GPS‑enabled workouts. The ring no longer requires a six‑minute walking test to enable the metric. The estimate appears in Oura Labs for third‑generation rings and newer models. The change makes it easier to track aerobic fitness over time.

Apple Watch and Fitbit already offer similar cardio metrics. Oura’s new features make the ring a competitive choice for people who prefer a ring over a watch or bracelet. The addition expands Oura’s lineup of holistic health data. Users can now compare their cardio data across different wearable brands.