불안정한 바닥위에서 발목각도가 기립균형에 미치는 영향

The Influence of Foot Angle on Standing Balance Upon the Unstable Platform

The purpose of this study was to compare the balance ability at different foot angle with KAT 2000 (Breg, Inc., Vista, CA. 1994). Forty-nine (male 24, female 25) normal subjects participated in this study. All subjects were assessed under two conditions. One was eye-opened condition and the other one was eye-closed one in 3 psi surface condition. All subjects were tested at different foot angle that were toe-in 25°, 45°, toe-out 25°and 45°. The subject attempted to keep the platform as stable as possible with eyes closed and with eyes opened for every 20 seconds. The starting position was that subject crossed their arms across chest and flexed knees slightly. The results of each teat were showed by a score on screen, which meant balance index. These collected data were analyzed using oneway ANOVA, Scheffe test, and t-test. The results of this study were as follows: 1. When the foot angle were changed, balance index was the lowest in toes-out 25°condition and greatest with toes-in 45°with eyes opened and with eyes closed. There were statistically significant difference with eyes opened and with eyes closed(p<0.05). 2. There was statistically significant difference in balance index according to visual condition and the balance index tested with eyes closed was higher than with eyes closed(p<0.05). 3. There was statistically significant difference in balance index by gender(p<0.05).