fast twitch workout

I was reading that machines like bowflex with cable resistance bands build fast twitch muscles. True? False? Whats the best workouts to build fast twitch muscle for MMA? I have a Crossfit in my city, i was thinking that might be my best bet.....any insight would be appreciated

As far as I know the best things are plyos, sprints and olympic lifts, but you need a base of strength to work with. Crossfit can be good if it's a good crossfit gym but they do vary.