I've done MMA for 7 years and I'm still going. mostly what i do is resistance training, aerobic training, and once a week heavy weight. you cant also find different vartiations of trainings that teach you how to flex while punching which is very useful in a fight because the punches wont hurt nearly as bad. such things like doing decline sit ups with curl weights in your hands and on the way up throw two punches, then at the top throw two more, etc.