I would like to discuss martial arts training in general, specifically how often to train and the length of time you train. I've heard stories of people training 8 hours a day and I've even done that myself on occasion, however, Im not sure its necessarily the best way to train. First of all, you have to have the time to train 8 hours a day but aside from that, if you ask me it can be overdoing it, at least if you train 8 hours a day on a regular basis. Those that do train 8 hours a day, they might do it if they've got competition coming up but I don't think they would do it every day 365 days a year. The body and mind need time to rest and recover and overtraining can be detrimental. I've known of people who've really gotten into weightlifting and would lift weights for hours every day and as a result their progress would slow and in some cases they would even go backwards since they weren't getting the rest they needed. So training intensely for 8 hours a day might be a good thing to do every once in a while but probably not on a regular basis.