The Effect of Muscles Fatigue on the Knee’s Kinetics and Kinematics Characteristics

Badminton is very popular on college campuses. In badminton, the anterior cruciate ligament of players has a higher risk injury. There are many studies investigating impact fatigue injury professional athletes, but few focused students. We hypothesized that knee joint would experience greater ground reaction forces, valgus moments, and flexion moments lunge contact in amateur after than those indicators before fatigue. Ten male badminton amateurs were enrolled this study. They performed to hit shuttlecock at designated position then quickly returned starting Fatigue was induced by repeated isokinetic flexion/extension knee. Lower body kinematics force (GRF) collected further used calculate lower from initial maximum flexion. Compared pre-fatigue condition, peak moment (p = 0.012) abduction 0.01), horizontal 0.027) increased significantly 0.01). After muscle fatigue, buckling contact, backward GRF also significantly. These changes might increase (ACL). The muscles around did not change vertical direction contact. Combined with results our study, coaches teachers should training extremity strength endurance daily class training, pay special attention coordinated development muscles.