CHANGES IN RUNNING VELOCITY AND KINETICS OF THE LOWER LIMB JOINTS IN 100 m SPRINT RUNNING

  • Yuichi Haneda
  • Michiyoshi Ae
  • Yasushi Enomoto
  • Koji Hoga
  • Norihisa Fujii
Keywords: 100 m sprint, running velocity, joint kinetics, power

Abstract

The purpose of this study was to investigate the changes in kinetics of the lower limb joints in 100 m sprint running. Nine male sprinters running 100 m with the maximum effort were videotaped at every 10 m from the start to 90 m mark with five high-speed cameras and five normal VTR cameras. Analyses of the relationship between changes in running velocity and the kinetics, joint torque, joint torque power, of the leg indicated that the critical joint kinetics factors in 100 m were: In the acceleration phase, the joint torque power exerted by the hip flexors in the early recovery phase and by the hip extensors in the late recovery phase; In the maintaining phase, the joint torque power exerted by the hip flexors in the early recovery phase and by the knee flexors in the late recovery phase.