KINETIC ANALYSIS OF LOWER EXTREMITY DURING SIDESTEP CUITING UNDER DIFFERENT DIRECTIONS

Abstract

The purpose of this study was to investigate the ground reaction forces, joint reaction forces, net muscle joint moments of the ankle, knee and hip during elite lhandball athletes executed typical cutting maneuver under four different directions. Four male elite handball players were tested during fast running (4.5-5.5 m/s) and then performed cutting to the right off (30°, 400 50°, 600 A JVC camera (60 Hz) and synchronized with force plate (1200 Hz) were used to collect the relative parameters of braking leg during cutting maneuver. Each participant's braking leg (right leg) was modeled as a system of rigid bodies. The inverse dynamics approach was used to integrate the body segment parameter, kinetic and force plate data, and to solve the resultant joint moments. The results showed that sidestep cutting maneuver would produce a load and according to the increase of cutting angles, the lower extremity could receive a strike force and moment during the braking phase. Besides, while the knee angle of f1exion was small and repeated loading of this magnitude were enough to produce the fatigue of lower extremity joints that would eventually resu'lt in complete disruption and clinical lower extremity joints injury.