Research On The Validity Of Dynamic Postural Stability Evaluation Methods For Functional Ankle Instability Patients

Objective: The postural stability of functional ankle instability patients showed a marked decline of the situation,thereby affecting the patient's daily life and sports performance,the use of attenuation of damped vibration calculation time to stabilization in patients is a kind of new method,but its effectiveness remains to be tested.This study want to check the detection of test-retest reliability,discrimination and responsiveness of this new method,then checking the effectiveness of this new evaluation method,providing a theoretical basis for the method to the validity evaluate of functional ankle instability patients.Methods: total of 60 subjects were selected and divided into experimental group(n = 30)and control group(n = 30)according to the criteria of functional ankle instability.Two groups of subjects were tested the forward landing,Comparing the results of each groups and between two groups,and the experimental subjects were 6 weeks of intervention,intervention after a test.Results: the ICC coefficient of the first test and repeated test results are low and not statistically significant(P > 0.05);subjects in the experimental group TTSx and TTSz was significantly higher than that of control subjects(P < 0.01),the dynamic postural stability index of the three directions were significantly greater compared with the control group(P < 0.05.P < 0.01),Y-Balance standard index was significantly less than the control group subjects(P < 0.05),but the test results of static stability and the control group had no difference(P > 0.05);the intervention group subjects TTSx and TTSy were significantly decreased(P < 0.01,P < 0.05)but almost TTSy no change in female subjects TTS range is greater than the male subjects,the subjects of Cumberland ankle instability scale scores have improved significantly(P=0.000).The results of static stability test increased significantly(P < 0.05),Y-Balance standard index increased significantly(P < 0.05).Conclusion:TTSADV calculation method is able to correct distinguish between functional ankle instability patients and normal people,and it also can correct response to the changes on functional ankle instability patients during intervention;because of the influencing factors test subjects and landing mode,the TTSADV calculation method dosen't have good performance in the repeated test,it should be improved in further study and;according to the validation of this study,the TTSADV calculation method can accurately evaluate the subjects' s dynamic postural stability in three different dimensions.