MMA competitors (n = 14; age = 22.4 ± 4.4 years; body mass = 71.3 ± 7.7 kg; stature = 171 ±9.9 cm) were observed during training for 8 consecutive weeks without intervention. International Medieval Combat Federation | Imcf Rule ONE 158: TAWANCHAI VS. LARSEN. Medieval combat is the martial art sport strictly related with the medieval history. These rules help ensure athlete safety and fair competition by providing a consistent set of rules for the sport â something that was missing in the early days of mixed martial arts. MIXED MARTIAL ARTS UNIFIED RULES OF CONDUCT Global Martial Arts Martial arts - Wikipedia