Problem:

The maximum rate of oxygen consumption (VO2Max) values are the same when performing different types of workouts (such as running and walking).

Solution:

This is normal and does not indicate an issue with your device.

VO2Max refers to the maximum amount of oxygen your body can utilize during intense exercise. Your VO2Max value will not change in a short period of time, even when you are engaged in different types of workout. You can improve your VO2Max through long-term training and exercise.