Racquetball

I went to the doctor yesterday, apparently I have a stress fracture of my left tibia and need to get a MRI to see if I need surgery or not. He told me not to do any cardio except swimming and recumbant bike for now, absolutley no running. I'm going to follow orders for the time being, but I refuse to stop playing racquetball with my son, and we played 3 games tonite at the gym.