To credit progress towards your daily Exercise goal, the Activity app aims to identify activity that equals or exceeds the intensity of a brisk walk.
This applies both during general daily wear and when recording workouts via the Workout app.
The definition of a brisk walk varies from person to person and depends upon your personal information. To check that your personal information is accurate and to update it over time:
- On your iPhone, in the Watch app, go to: My Watch (tab) > Health > Edit - tap and adjust items, then tap on Done.
During general daily wear and when your iPhone is not taken along on certain outdoor workouts, the Activity app relies on your arm motion (measured by the accelerometer) to track movement for the purpose of crediting progress towards the Exercise goal. For the best results, allow the arm on which you are wearing your watch to swing naturally as you move around and also during workouts.
Calibrating your watch can improve the accuracy of various estimations (including Exercise credit) made by the Activity app and Workout app. It does this by teaching your watch how your arm movements relate to your stride lengths at each of your typical walking and/or running speeds.
If it is not convenient to swing your arm on outdoor walks or runs (perhaps due, for example, to holding dog leads), it may help to take your iPhone with you and track walks and runs using the Workout app on your watch, choosing Outdoor Walk or Outdoor Run as the activity type. When Location Services are enabled on your iPhone (Settings > Privacy > Location Services), your watch can use GPS data from the iPhone to estimate your pace and distance covered. However, Exercise credit will still only be awarded by the Activity app when your activity is at least equivalent to a brisk walk.
More information:
Use the Activity app on your Apple Watch - Apple Support
Use the Workout app on your Apple Watch - Apple Support
Calibrating your Apple Watch for improved Workout and Activity accuracy - Apple Support