Is my workout counted twice?

I have a Polar chest strap heart rate monitor. When exercising (e.g. nordic walking today) I start both the Polar app on the iPhone and the Workout app on my Apple Watch. The iPhone Health app shows both results:

Is this counted as one workout or is the sum of the two recordings used instead for different calculations (no. of steps, total distance walked in the day, etc.)? Please disregard the difference between the duration and distance in my example. I stopped the Polar app at the end of the workout but forgot to do the same for the Watch app until later when I was already in my car driving home.