Basically, it's a time factor with me. I incorrectly assumed that I could essentially walk into a Kickboxing fight with little to no cross-training and do okay. Last night taught me that, although there is some overlap in technique, Kickboxing differs significantly enough from Karate that I would require extra training. I would say, optimistically, that I could be ready in maybe two years after training 3x a week. That would require me to give up training at my current Dojo, which I'm not willing to do. As far as conditioning goes, I think I could get to the level of fitness required. Although, I really need a goal to focus on in order to commit. As intense as my Karate classes are, I normally don't get a lot of supplemental conditioning besides hiking with my dog. I also drink heavily and don't have the best diet. If I have a goal to focus on, I supplement my normal training with cardio and strength training 3x a week. (Tuesday, Thursday, Saturday: Karate Classes. Monday, Wednesday, Friday: strength/cardio) I maintain a strict diet and completely cut out alcohol. That will usually get me into "fighting shape" after 6-8 weeks. I incorrectly assumed that I could do that and be reasonably competitive in amateur Kickboxing. Maybe I could talk to my instructor about it and see what he has to say.