Is your Apple Watch not accurately tracking your morning walks, workouts, and other fitness activities? This is something that can be resolved by resetting the fitness calibration data on your Apple Watch. This is pretty easy to do.
When you start using a new Apple Watch while walking or running outside, it automatically begins to calibrate the accelerometer by learning your stride length at different speeds. This goes a long way in making sure your activity data such as distance traveled and calorie calculations are accurate. However, if the calibration wasn’t done properly, you may see inaccurate numbers in the Workout app. The only way to fix this is by getting rid of the calibration data that was done by the Apple Watch and starting over.