Thanks for writing in with this question. I’m not in a position to give any medical advice. I have never had any experience with hematauria, either personally or with anyone I have coached. I’ve never heard of it as a symptom of overtraining either. If the docs didn’t find anything medically amiss I guess I try a gradual return to training over the course of a few days and see if it reoccurs. I’m sorry I do not have any better suggestion for you. Maybe someone else here will have had experience with this.