What's The Alternative?

Since there's no kids kung fu this Saturday I felt obliged to go for a run on Friday at work, just a couple of miles but it felt like hard work all the way. Unfortunately through the next couple of weeks I'm going to have to do a lot of running because there aren't many classes I can do, and I can't think of another alternative that doesn't involve just vegetating on the sofa - I'm not really disciplined enough to train by myself and there's a limit to how often I can force the kids to join in, especially since one of them has her arm in a cast.