THE EFFECT OF KNEE FATIGUE ON SHOCK ABSORPTION DURING CUTTING MOVEMENT AFTER JUMP-LANDING

YouKyung Kim, ChangHong Youm, MinJi Son, JinHee Kim, MyeoungGon Lee

Abstract


This study aimed to investigate the effect of knee fatigue on shock absorption during cutting movements after jump-landings. Twenty-four healthy subjects performed cutting movements following jump-landings from 40 cm height, and Pre, Post-SO%, and Post- 30% of their pre-test measured maximum toque, used by isokinetic flexion/extension of the knee. Results showed that Post 30% fatigue were associated with decreased ROM of the knee, increased ROM of the ankle, decreased load rate, increased knee stiffness, decreased peak power of the knee, decreased work of the knee, and increased work of the ankle. We suggest that the post-30% fatigue appears to be the threshold to quantify the fatigue level. This study indicate that increases in fatigue modify the strategy shock absorption from knee to ankle in cutting movements following jump landings.

Keywords


single-leg; muscle fatigue; kinematics; kinetics; landing

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ISSN 1999-4168