Distance and time on the water
Total distance and total time are the easiest ways to see your fitness grow. Weekly and monthly totals smooth out the good and bad days.
Average and max speed
Average speed helps you compare sessions of similar length. Remember that wind, current and tide change your numbers, so look at the trend over many paddles rather than a single one.
Consistency beats intensity
Getting out regularly matters more than one big paddle. Weekly or monthly distance goals are a simple way to build the habit.
Keep conditions in mind
A slow session in strong wind may be a better effort than a fast one on flat water. Noting conditions alongside your stats gives each number context.
Track per board or kayak
If you paddle several craft, track them separately. You will see how each one is used and how your speed compares between them.
Make it effortless
The best tracking is the kind you do not have to think about. Start a session from your Apple Watch, paddle, and let the app record the route and stats for you.