Hi
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. It is possible that your recent workouts did not meet this requirement.
The definition of a brisk walk varies, depending upon your personal information. To check whether yours is accurate and to make any corrections:
- On your iPhone, in the Watch app, go to: My Watch (tab) > Health > Edit - tap and adjust items, then tap on Done.
During 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 and credit Exercise progress. For the best results, allow the arm on which you are wearing your watch to swing naturally as you move around and during workouts (for relevant activity types).
During workouts, for the best performance from the heart rate sensor, also ensure that you wear your watch snugly on the top of your wrist.
Calibrating your watch can improve the accuracy of various estimations (including Exercise credit) made by the Activity app and Workout app. More information and instructions for calibrating your watch (including for resetting existing data and starting afresh) are available via the link below.
If you would prefer to receive Exercise credit for your workouts regardless of their intensity levels, track them via the Workout app using Other as the activity type. This will credit one minute of Exercise for each full minute of the workout. Active calories will be estimated at a rate equivalent to a brisk walk or based on data recorded by the heart rate sensor, whichever is higher.
More information:
Calibrating your Apple Watch for improved Workout and Activity accuracy - Apple Support
Use the Activity app on your Apple Watch - Apple Support
Use the Workout app on your Apple Watch - Apple Support