The single foot static balancing ability of people suffering from single side functional ankle joint instability
In order to probe into the characteristics of the single foot static balancing ability of people suffering from single side functional ankle joint instability, the authors used a WIN-POD balancing instrument to test the static balancing ability of 15 people suffering from single side functional ankle joint instability and 15 normal people in eyes opened and shut single foot standing conditions for 10, and revealed the following findings: 1) in an eyes opened left foot standing condition, the differences in envelop area and axis Y shaking amplitude between the people in the experiment group and the people in the control group were statistically significant(P0.05); in an eyes shut standing condition, except axes X and Y shaking speeds, the differences in other indexes between the people in the experiment group and people in the control group were statistically significant(P0.05); 2) in an eyes shut right foot standing condition, the differences in envelop area and axis Y shaking amplitude between the people in the experiment group and the people in the control group were statistically significant(P0.05); 3) for the people in the experiment group, in an eyes opened standing condition, the difference in envelop area between the ill foot and the healthy one was statistically significant(P0.05), in an eyes shut standing condition, the differences in envelop area and average axis Y shaking amplitude between the ill foot and the healthy one were statistically significant(P0.05); 4) for the people in the control group, in an eyes shut standing condition, except axes X and Y shaking speeds, the differences in other indexes between the left foot and the right one were all statistically significant(P0.05). The said findings indicate the followings: for people suffering from single side functional ankle joint instability, the balancing ability of the ill foot is slightly weaker than that of the corresponding foot of normal people, and also weaker than that of the healthy foot, while the balancing ability of the healthy foot has a certain compensation function due to the lack of balancing ability of the ill foot, which results in that its balancing ability tends to be slightly better that of the corresponding foot of normal people.