This paper identifies the changes of the running gait after the ACL rupture and the further effects of the concomitant medial meniscus tear on the running gait changes after the ACL rupture. Based on the 3D motion capture analysis method, quantitative analyses are made for the changes of the running gait in the ACL-deficient patients (22 healthy controls, 8 isolated ACL-deficient patients, 8 ACL-deficient concomitant with medial meniscus tear patients). The results show that for the ACL-deficient knee joint, a significant decrease of the exogenous flexion moment is observed during jogging, which is not only related to the weakening of the extensor muscle strength of the ACL-deficient side, but also related to the change of the neuromuscular control mode. For the patients with ACL rupture combined with the medial meniscus tear, a significant external rotation instability of the knee is observed during jogging, which may be related to the reduced control of rotation stability caused by the medial meniscus posterior horn tear. It is suggested that in the rehabilitation training program for the ACL rupture patients, one should pay attention to their abnormal running gait and intensify the training of flexor and extensor muscles and rotational muscle group and the neuromuscular training to improve their abnormal running gait and reduce the risk of the secondary injury after the ACL rupture.

ACL rupture  /  gait analysis  /  biomechanics