The Research Based On Segment Displacement On The Posture Control Of Functional Ankle Instability

Purposes: The study explored the stability of functional ankle instability and the relationship between the stability of functional ankle instability and the relationship between the stability of functional ankle instability and the stability of functional ankle instability.The effect of the balance mechanism on the balance of functional ankle instability provides a better theoretical basis for posture control of functional ankle instability.Methods: The study evaluated In 12 subjects with unilateral functional ankle instability were selected as the experimental group and 12 normal persons as the control group,using the infrared high-speed motion capture system and KISTLER 3D.The force measuring station separately measures the average speed on the X-axis,the average speed on the Y-axis,the root mean square value of the speed on the X-axis,and the RMS value of the speed on the Y-axis in the different states of the stance when standing in a standing state.Under the link displacement,the contribution rates of the two mechanisms,using repeated measures analysis of variance to compare the stability of the two groups in the displacement of the same movement at different frequencies in different frequencies.Results:(1)When the swing arm moves,there is a very significant difference between the different frequencies for the Y-axis swing speed and the Y-axis speed root mean square(P<0.01).For the Y-axis swing speed,the group has very Significant difference(P<0.01),for X-axis swing velocity,X-axis velocity root mean square,and Y-axis velocity root mean square,there was a significant difference between the groups(P<0.05);(2)in roll motion At the time of the X-axis swing speed and the X-axis speed rms,there was a significant difference between the different frequencies(P<0.05).For the Y-axis swing speed and the Y-axis speed rms,there were very different frequencies.Significant difference(P <0.01),for the X-axis swing speed,X-axis velocity root mean square,Y-axis swing velocity and Y-axis velocity rms,there is a very significant difference between groups(P <0.01);(3)In the rotary motion,there is a very significant difference between the frequencies of X-axis swing speed,X-axis speed root meansquare,Y-axis swing speed,and Y-axis speed root mean square(P<0.01);X-axis swing speed,X-axis velocity root mean square,there is a very significant difference between the groups(P <0.01)(4)When the swing arm moves,there are very significant differences between different frequencies for the first mechanism in the fore and aft direction,the second mechanism in the fore and aft direction,the first mechanism in the left and right direction,and the second mechanism in the left and right direction(P<0.01);(5)In the roll motion,there is a very significant difference between the different frequencies for the first mechanism in the fore and aft direction,the second mechanism in the fore and aft direction,the first mechanism in the left and right direction,and the second mechanism in the left and right direction(P<0.01).For the first mechanism in the fore and aft direction,the second mechanism in the fore and aft direction,the first mechanism in the left and right direction,and the second mechanism in the left and right direction,there was a significant difference between groups(P<0.05);(6)In the case of rotation,The first mechanism in the direction and the second mechanism in the fore and aft direction were significantly different at different frequencies(P<0.05).Conclusion:(1)Functional ankle instability and normal people have different performances in different parts of the displacement process,mainly in the instability of functional ankle instability is relatively poor,indicating that functional ankle instability in Stability is more likely to be impaired during exercise movements;(2)The contribution rates of the two mechanisms in the roll motion of functional ankle instability and normal people behave differently,indicating that the functional ankle instability is more Use mobile COP to control your posture stability.