The purpose of this study was to investigate the effects of isokinetic muscle strength and fitness in the taekwondo player of elementary school and poomsae player, Twenty four participants were assigned, 5~6 with elementary school of taekwondo player boys (n=12) and poomsae player (n=12). Subjects of this study were who lives in D metropolitan. Using the Cybex 770(cybex NormTM Test & Rehabilitation) isokinetic dynamometer and the measures were knee joint of both, trunk muscle of protractor muscle and flexor muscle from average power %BW. The data obtained from each measure were analyzed using Independent t-test, Mean, Standard Deviation from SPSS/PC 12.0 Version. The significance level set al α=.05. From the results of better in Comparison with isokinetic muscle It showed the shame where the taekwondo player is higher poomsae player than from maximum strength(60°/sec) and the musclar endurance(240°/sec), shame where taekwondo player is higher poomsae player than from muscular strength(60°/sec) and the muscle power(90°/sec) to trunk muscle. In addition to physical fitness(burpee test, side step, standing high jump, turn a skipping rope) did show significantly from Taekwondo Player of Elementary School and Poomsae Player(p<.001).
※ Key words : Isokinetic lumber muscle power