The Premium Mega Gym in Columbus Ohio offering MMA, Brazilian Jiu-Jitsu, Judo, Muay Thai, Fitness Programs, Strength Training, Kids Programs, and Self Defense classes! Ronin Training Center has built out a facility like no other in Central Ohio by bringing the necessities of Muay Thai, Brazilian Jiu-Jitsu, MMA, Judo, Fitness, Wrestling, Kids Programs and so much more all under one roof.