Abstract:

BACKGROUND: At present, the study to balance ability of functional ankle instability patients is less. The balance ability deficiency may also be one of the important reasons for ankle repeated injury, so the research can effectively reduce the damage probability.
OBJECTIVE: To explore the static balance ability characteristics of functional ankle instability patients.
METHODS: Ten male subjects with unilateral functional ankle instability were enrolled as the experimental group in the study, and other 10 healthy match-paired subjects were served as the control group. Their static balance ability was measured under double feet standing and single foot standing using win-pod system, the double feet testing lasted for 30 seconds and the single foot testing lasted for 10 seconds. Evaluation parameters of balance ability were obtained.
RESULTS AND CONCLUSION: During double feet testing, there were no significant differences in balance ability parameters between the experimental group and the control group whether eyes be opened or closed (P > 0.05), but the index values of double feet testing were obviously less than those of single foot testing. So we concluded that in the double feet standing, there was no significant difference in the static balance ability between functional ankle instability patients and normal persons. Moreover, the static balance ability of double feet was better than that of single feet. In the single foot standing of the affected foot, the static balance ability of functional ankle instability patients was slightly worse than that of the normal persons, especially with eyes closed. Comparison of the average swing between the X-axis and Y-axis found that in the process of maintaining balance posture, the swing direction of the body center of gravity was mainly in the anteroposterior direction.

Key words: bone and joint implants, biomechanics of bone and joint, functional ankle instability, static, balance ability, double foot, single foot, other grants-supported paper