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.
When you are not using the Workout app, the Activity app relies on your arm motion (measured by the built-in accelerometer) to track movement for this purpose, so allow the arm on which you are wearing your watch to swing naturally as you walk (or run).
Exercise results are also based on your personal information. To check that this 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.
You may also wish to calibrate your watch, which will help to improve the accuracy of various estimations (including Exercise credit) made by the Activity app and Workout app. More information and instructions for how to calibrate your watch are available via the link below.
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