I had a tough time just doing 10.
I meant 11 if it helps your confusion.
I was on the treadmill. Mph is my speed setting. Maybe I'm not suppose to count the easy part of the interval. In that case the order of the the workout would have been 15x1, 5x1, 5x1. I don't know, I'm just a dumb tinner.
We'll just say a run took place.