Evaluation And Training Of Lower Limb Muscle Strength Of Basketball Players With Chronic Knee And Ankle Injuries

The technical and tactical characteristics of modern basketball are strong physical confrontation and fast-paced movement.In basketball games,the knee and ankle joints of the lower limbs are under continuous tension,which is likely to damage the meniscus,anterior cruciate ligament,or patellar dislocation and patellar tendon strain.In the meantime,ankle joints are prone to instability,sprains,and pecial physical fitness,which further affects the performance of basketball skills and tactics.Isokinetic strength testing equipment can accurately test and evaluate the muscle function,muscle endurance,flexion-extension ratio and other muscle functions of the knee and ankle joint flexion and extension muscles of knee and ankle injured basketball athletes,while the functional fitness test can comprehensively evaluate the functional capabilities of lower limb muscle strength when athletes play basketball,so as to determine the impact of knee and ankle joint sports injuries on basketball athletes' sports ability and the risk of reinjury.Research purposes:Assess the lower extremity muscle strength of basketball athletes with chronic knee and ankle injuries,and give targeted rehabilitation treatment and physical training to observe the training effect,so as to provide experimental research basis for basketball athletes' scientific training and sports rehabilitation guarantee,and help improve special training effect.Research methods:Screened and recruited 24 basketball special college students with chronic knee and ankle joint injuries through questionnaires,randomly divided into experimental group(n = 12)and control group(n = 12),and recruited healthy basketball special college students as Healthy control group(n = 12).The experimental group was given targeted rehabilitation treatment and guidance combined with physical training,while the control group maintained daily training and conducted health education and guidance.Before and after the experiment,evaluating the strength,muscular endurance,and flexion-extension ratio of the knee and ankle joints of all subjects;testing the basic physical fitness indicators such as vertical jump height,standing time with closed eyes with one foot,Smith squat,and T-turn,and comparing the changes between before training and the after.Research result:(1)Results of knee strength test(60 ° /s)of subjects in the experimental group,control group and healthy group before training: the absolute strength of the left and right flexors and extensors of the knee joint in the experimental group was not significantly different from the control group(P > 0.05);The absolute strength of the left and right knee flexors and extensors of the experimental group was not significantly different from that of the healthy group(P > 0.05).There was no difference between the three groups(P> 0.05).(2)Test results of knee muscle endurance(180 ° / s)of subjects in the experimental group,control group and healthy group before training: there is no significant difference between the left and right knee flexor and extensor muscle endurance of the experimental group compared with the control group(P> 0.05);the muscle endurance of the left and right knee flexors and extensors of the experimental group was significantly reduced compared with the healthy group(P <0.05).(3)Test results of knee H / Q ratio of the experimental group,control group and healthy group before training: the knee H / Q ratio of the experimental group and the control group had no significant difference under the two angular velocities(P > 0.05);before and after the experiment,the comparison of the characteristics of the knee joint H / Q ratio between the experimental group and the healthy group also showed that there was no significant difference between the two groups(P> 0.05),between0.62-0.67.(4)Test results of ankle joint muscle strength(60 ° / s)of subjects in the experimental group,control group and healthy group before training: there is no significant difference between the left and right flexor and extensor muscle strength of the experimental group compared with the control group Significance(P> 0.05);There is no significant difference between the left and right flexor and extensor muscle strength of the ankle joint in the experimental group and the healthy group(P>0.05).(5)Results of ankle joint muscle endurance test(180 ° / s)of subjects in experimental group,control group and healthy group before training: the muscle strength of left and right flexor and extensor muscles of ankle joint in experimental group is not significantly different from that of control group Significance(P> 0.05);the left and right extensor muscle strength of the ankle joint in the experimental group was not significantly different from the healthy group(P> 0.05);the right ankle flexor and left ankle flexor endurance index Compared with the healthy group,there was a significant difference(P <0.05).(6)T / Tc test ratio results of the ankle joints of the experimental group,control group and healthy group before training: There is no significant difference between the left and right ankle joint T / TC ratios of the experimental group and the control group and healthy group(P> 0.05);but under the two angular velocity measurement conditions,the left-right ankle joint flexion-extension ratio is significantly different,the right side is higher than the left side(P <0.05),the three groups are similar.(7)Results of basic fitness tests of the three groups of subjects before and after the experiment: Before the experiment,the results of the physical fitness test results of the subjects of each group of subjects in running up and down,T-turn,Smith squat and one-foot closed eyes stand There was no significant significance(P> 0.05);after the experiment,the standing time of the experimental group was significantly longer than that of the healthy group with closed eyes and one foot,which was statistically significant(P <0.05),and the other special physical fitness was not significant among the three groups.Difference(P> 0.05)Analysis conclusion:Chronic knee and ankle injured basketball special athletes mainly manifested as reduced knee and ankle flexor and extensor muscle endurance,insufficient right ankle extensor muscle strength,left and right ankle muscle strength imbalance problems,targeted rehabilitation physical prescription relieved knee and ankle discomfort,strengthened the knee ankle endurance,ankle strength and stability,and coordinated agility training have significantly improved the proprioception of the lower limbs,promoted basic physical fitness,and achieved the desired results.About half a year after the experiment,a feedback questionnaire was conducted on the experimental group and the control group.The number of knee and ankle joint injuries in the experimental group was less than that in the control group,and they had better athletic performance in the competition.Discomfort is reduced.Achilles tendon injuries,which reduces the muscle function of the lower limbs and s...