Grudge Training Center is the premier MMA training center in Wheat Ridge, Colorado, and home of the Grudge Fight Team and Grudge Sports. Our Head Coach Trevor Wittman has many years of boxing, kickboxing and MMA experience. Coach Wittman and his coaches bring a positive training environment. We offer Pro training, Amateur Fight Team Training, Gracie Jiu-Jitsu, Self-Defense and Cardio Kicking classes. Grudge Training Center offers fun for the whole family!