Hi
It is not currently possible to accurately track the results of paddle boarding workouts via the Workout app whilst also recording distance and a route map.
For each of the main activity types in the Workout app, Apple Watch uses tailored calorie calculations and the most relevant sensors for that activity type.
The Workout app includes two swimming activity types: Pool Swim and Open Water Swim. However, both of these assume that you will be swimming continuously, so neither is appropriate for paddle boarding. Similarly, Outdoor Walk assumes that you are walking, so is again not appropriate.
For activities that are not included in the main activity types, instead record your activity as "Other". 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. However, neither distance nor a route map are recorded for Other workouts.
When saving your workout, tap on "Name Workout" to label your Other workout activity as "Paddling".
You may wish to lock your watch to prevent accidental screen interactions during your workout:
For the best performance from the heart rate sensor (the accuracy of which can potentially be affected by water), be sure to wear your Apple Watch snugly (but not too tightly) during your workouts. Apple suggests tightening your Apple Watch band before workouts and loosening it again afterwards:
Your heart rate. What it means, and where on Apple Watch you’ll find it. - Apple Support
If you would like to submit a feature request to Apple in respect of adding Paddle Boarding as a main workout type, with distance and a route map recorded, then you can do so here:
Feedback - Apple Watch - Apple
