The Research For Biomechanical Effect Of Arch Support Insole On Anterior Cruciate Ligament Injury During Basketball Stop-jump Task

Objective: In recent years,anterior cruciate ligament injury(ACL)is very common in basketball,football,tennis and other sports.Generally speaking,ACL injury usually leads to the decline of knee joint performance,and seriously affects the athletes' quality of life.Therefore,preventing ACL injury is of great significance to reduce the loss of national medical resources and enhance the national physique.The purpose of this study is to assess the risk of ACL injury and find out if there has any difference in sports performance by collecting the data of kinematics and kinetics under the conditions of Arch Support Insole(AS)and Flat Insole(F).It provides experimental evidence for athletes to prevent ACL injury more effectively and improve their sports ability.Method: Thirty skilled male basketball recreation player were recruited(average age 20.86±2.15);Height 179.33±4.7cm);Body mass 71.14±7.25kg).They were required to complete stop-jump task in two condition AS insole and F insole(random).Kinetic and kinematic data were collected by 3-dimensional platform force and Infrared high speed motion capture system.Paired samples T test?independent sample T test,Pearson correlation analysis were performed with SPSS22.0.Result:(1)The peak proximal tibia anterior shear force in stop landing phases was significantly larger than that in take-off phases(P=0.000);The peak posterior ground reaction force in stop landing phases was significantly larger than that in take-off phases(P=0.000);The peak vertical ground reaction force in stop landing phases was significantly larger than that in take-off phases(P=0.000);The peak knee extension moment in stop landing phases was significantly larger than that in take-off phases(P=0.000).(2)In stop landing phases,the peak proximal tibia anterior shear force and vertical ground reaction force of AS insole were significantly higher than those of F insole(P=0.002,P=0.005);the peak knee adduction moment,the peak external rotation moment and external rotation moment(the time of peak proximal tibia anterior shear force)under AS insole were significantly greater than those of F insole(P=0.011,P=0.023,P=0.028);There was no significant difference in the range of three-dimensional angle of knee joint;The time between the initial contact and the peak proximal tibia anterior shear force,peak posterior ground reaction force of AS insoles was significantly shorter than that of F insole(P=0.022,P=0.042);the loading rate of peak proximal tibia anterior shear force,peak posterior ground reaction force,and peak vertical ground reaction force of AS insoles was significantly higher than that of F insoles(P=0.034,P=0.036,P=0.032);the peak knee flexion angular velocity and knee flexion angular velocity(the time of the peak posterior ground reaction force)of AS insole were significantly greater than that of F insole(P=0.015;P=0.011).(3)There is no significant difference in jump height between AS insole and F insole.Conclusions:(1)ACL injury is more likely to occur in the stop-landing phase than in the take-off phase.(2)AS insoles have the risk of increasing ACL load.(3)The AS insoles had no effect on the jump height.