An understanding of human movement in sport engineering demands both a knowledge of human system and mechanical system. In this report, changes in movement pattern of lower extrimities due to increase in running speed are considered aspects of electromyographic study, multibody link model and viscoelastic model. In these viewpoints, amplitude of the hip torque and the knee torque were increased at the running speed increased, but the increase rate of the hip torque was bigger than that of the knee torque.
