Ground Hammer Training Centre - Hereford's ultimate combat sports and physical fitness centre. Providing classes in BJJ (Brazilian Jiu Jitsu) No Gi, Gi, MMA, Wrestling and Functional Fitness. Improve your grappling and striking skillset in a range of martial arts to compete or improve your self defence skills at our Dojo. Get involved with functional fitness classes for a happier and healthier version of yourself.