The purpose of this investigation was to determine the effects of Kumdo practice and combined strength exercise on health related physical fitness and metabolic syndrome in elementary school students who are attending to the martial art gym in Seoul, 10 Kumdo practice group and 10 Kumdo and strength exercise group. There were significant increases in muscle strength and muscle endurance to Kumdo practice and combined strength exercise group compared with Kumdo practice group(p<.05) and for body composition, there were significant decreases in body fat and fat mass, also significant increases in muscle mass(p<.05). There were significant decreases in blood glucose and TG, elevated HDL-C was observed with Kumdo practice and strength exercise group(p<.05). It is concluded that Kumdo practice and strength exercise program might make beneficial effect such as increasing muscle strength and fat free mass, it also produces lower incidence of cardiovascular disease and metabolic disease during 12 weeks for growing elementary school students.