| Objective:Knee joint injury often occurs in single leg landing,which is related to the decrease of flexion angle of hip and knee joint on the support side,the increase of extension and valgus moment,and the increase of ground reaction force.Kinesio taping has been widely used in the field of sports protection in recent years,but whether it can correct injury-related biomechanical risk factors is still controversial,and there are few studies on the timeliness changes of kinesio taping.Therefore,this study intends to compare the differences in the biomechanical characteristics of the lower limb joints of the knee joints in the three cases of kinesio taping,placebo taping and no taping,and to observe the changes of the biomechanical characteristics of the lower limbs at different times before and after taping,in order to provide reference for the application of knee kinesio taping in sports injury protection.Methods:In this study,40 healthy male college students were selected.Qualisys three-dimensional motion capture system,Kistler dynamometer and Noraxon surface electromyography instrument were used to synchronously collect the kinematics,dynamics and electromyography data of knee joint kinesio taping,placebo taping and no taping,as well as kinesio taping in a short period of time(immediately,30 min,60min after taping).In this study,SPSS26.0 software was used to statistically process and analyze the test data.After the normal distribution test,the data were statistically processed by one-way repeated measurement analysis of variance,and the significance level was p < 0.05.Results :(1)Effect of Kinesio taping on biomechanical indexes of lower limbs in single leg landingKinematic parameters : At the initial touchdown moment,hip(F=8.895,p=0.001),knee(F=3.846,p=0.026)joint flexion angle,knee(F=3.377,p=0.039),ankle(F=4.344,p=0.016)joint rotation angle were statistically different.Compared with no taping and placebo taping,kinesio taping could significantly increase the hip(p=0.000;p=0.040),knee(p=0.003;p=0.039)joint flexion angle and reduced knee external rotation angle(p=0.035;p=0.024);in addition,both kinesio taping(p=0.008)and placebo taping(p=0.010)reduced the ankle internal rotation angle.At the peak time of V-GRF,there were significant differences in hip(F=3.968,p=0.027)and knee(F=3.968,p=0.023)joint flexion angles.The flexion angle(p=0.011)of the hip joint under the action of the kinesio taping was greater than that without the taping;the knee flexion angle under the action of kinesio taping(p=0.010;p=0.042)was significantly greater than that of no taping and placebo taping,and there was no significant difference between non-sticking and placebo sticking angles.Dynamic parameters : At the initial touchdown moment,there was no statistical difference in lower limb joint torque between different taping methods.There were significant differences in hip(F=3.553,p=0.038)and knee(F=6.588,p=0.003)joint flexion torque at the peak time of V-GRF.The hip flexion torque(p=0.027)under the action of kinesio taping was greater than that without taping;the knee flexion torque under the action of kinesio taping(p=0.029;p=0.004)was less than no taping and placebo taping torque,and there was no significant difference between no taping and placebo taping torque.There was no statistical difference in the peak value of vertical ground reaction force.Electromyographic parameters : There were differences in the activation of vastus medialis(F=5.208,p=0.008)and rectus femoris(F=3.991,p=0.027).Under the action of kinesio taping,the activation degree of vastus medialis muscle(p=0.007,p=0.014)was greater than that of no taping and placebo taping,and there was no significant difference between no taping and placebo taping.In addition,the activation degree of rectus femoris muscle(p=0.045)was greater than that of no taping.(2)Effect of Kinesio taping on the timeliness of biomechanical indexes of lower limbs in single leg landingKinematic parameters : There were statistical differences in hip(F=9.750,p=0.000),knee(F=6.602,p=0.001)joint flexion angle,knee(F=3.840,p=0.017),ankle(F=13.085,p=0.000)joint rotation angle and ankle valgus angle(F=6.095,p=0.002)at the initial touchdown.The flexion angle of the hip joint was significantly larger than that of the no taping angle immediately(p=0.000),30min(p=0.000)and60min(p=0.000)after the taping,and 60 min after the taping(p=0.003;p=0.014)was significantly greater than that immediately after taping and 30 min after taping.The knee flexion angle was significantly greater than the no taping angle immediately(p=0.003),30min(p=0.000),and 60min(p=0.000)after the taping.The external rotation angle of the knee joint decreased significantly immediately after the taping(p=0.035)and continued to decrease until 30min(p=0.003),and increased at 60min(p=0.022).The ankle varus angle increased at 30min(p=0.000)and decreased at60min(p=0.001)after fixation.The internal rotation angle was smaller than the no taping angle immediately(p=0.008),30min(p=0.000),and 60min(p=0.000)after sticking.At the peak time of V-GRF,hip(F=6.392,p=0.001),knee(F=7.147,p=0.001)joint flexion angle,knee(F=7.161,p=0.001),ankle(F=13.608,p=0.000)joint rotation angle were statistically different.Hip and knee flexion angle at 30 min after taping(p=0.002;p=0.001),60min(p=0.003;p=0.000)was significantly greater than the no taping angle.The external rotation angle of the knee joint and the internal rotation angle of the ankle joint decreased gradually after the taping,and immediately after the taping(p=0.011;p=0.010),30min(p=0.011;p=0.010),60min(p=0.011;p=0.010).Dynamic parameters : At the initial touchdown moment,there was no statistical difference in the lower limb joint torque at different time points after the taping.The hip flexion torque(F=5.627,p=0.001)at the peak time of V-GRF gradually increased with time,while the knee flexion torque(F=5.845,p=0.013)decreased first and then increased.The flexion torque of the hip joint was greater than that of the no taping torque immediately(p=0.027),30min(p=0.002)and 60min(p=0.002)after the fixation;knee flexion torque decreased immediately after taping(p=0.029)and at30min(p=0.012)and increased at 60min(p=0.014).There was no statistical difference in the peak value of vertical upward ground reaction force in single leg landing task at different time points after taping.Electromyographic parameters : There was a statistically significant difference in the activation of vastus medialis(F=2.858,p=0.040)and rectus femoris(F=5.316,p=0.002).Specifically,the medial vastus muscle(p=0.007;p=0.038;p=0.027)and rectus femoris(p=0.045;p=0.030;p=0.009)increased immediately after taping,and there was still effect at 30 min and 60 min.Conclusion :(1)Knee kinesio taping can improve the kinematics,dynamics and electromyographic indexes of some lower limb joints of young men when landing on one leg,which is manifested as increasing the flexion angle of hip and knee joints,reducing the external rotation of knee joint and the internal rotation angle and torque of ankle joint,and increasing the activation rate of medial femoral muscle and rectus femoris muscle,suggesting that kinesio taping has a certain effect in correcting the biomechanical risk factors related to lower limb injury.(2)Immediately after the knee kinesio taping,the kinematics,dynamics and electromyographic indexes of some lower limb joints in the single leg landing of young men began to change,and there was still an effect until 60 minutes after taping.The hip flexion angle and torque,knee flexion angle,medial femoral muscle and rectus femoris activation rate showed an overall increasing trend from immediately after taping to 60 minutes,and the external rotation of knee joint and internal rotation angle and torque of ankle joint showed an overall decreasing trend,suggesting that the knee kinesio taping continued to play a role in correcting some biomechanical risk factors related to lower limb injury during this time. |
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