Measuring Your Activity
The Oura ring measures your physical activity using an extremely sensitive 3D accelerometer that can detect your hand movements. By combining the sensor signals with your personal information (height, age, weight, and sex), the ring can monitor the total amount of your physical activity, your energy expenditure and the number of steps you take.
Oura captures most activities, such as walking and running, automatically but for non-step based workouts, and workouts that don't require a lot of hand movement, you can use manual entry to further improve the accuracy of your activity score and daily calorie count.
On the Oura app for iOS, you also have the option to import your workouts from Health.