Oura announced two new fitness metrics for its smart rings. The first, called Cardio Effort, evaluates how much strain a wearer places on their body during activity. The personalized metric is divided into five levels: light, fair, maintaining, building and reaching, allowing users to see how their weekly activity compares with their baseline. It relies on the Training Impulse method to monitor long‑term cardiovascular trends, the company said. The second addition is an automatic estimate of VO2 Max. Previously known as Cardio Capacity in the Oura Labs app, it required a six‑minute walking test before it could be calculated. The updated feature derives VO2 Max passively from regular GPS‑enabled workouts, eliminating the need for a dedicated test. VO2 Max data will appear in Oura Labs for third‑generation Oura Rings and newer models. These updates broaden Oura’s health‑tracking suite. While Apple Watch and Fitbit have offered similar cardio metrics for a while, the new capabilities give ring‑wearers a comparable option without switching to a watch or bracelet.