Let's Make Robots!

pedometer

"Pedometer" for roller skates?

So as I mentioned a few months ago, I'm currently training to join a local roller derby team. I am, for lack of a better word, quite out of shape. I can only afford to go skating once a week, and want to make sure I am getting the most of my sessions.

I've seen pedometers for runners, and even small GPS units for skaters going outside, but what if you're inside?