I think you and your girl are doing a great job! My DD is 13 and in the midst of puberty and the diabetes management is not easy at all. My DD is not a competitive runner, but she used to be a hardcore dancer, and I found that it was way harder to control her BG on days were she was dancing the whole day. She is still very active, but not on that extreme level (we never knew how intense it would be at any given day) and it made things a little easier. So with her being the great runner she is, on one hand she is more sensitive to insulin, but on the other hand it is another factor that makes the daily management more complicated.