Purpose : The purpose of this study was to figure out the changes of normal people's balance ability when squat exercise in the condition of visual blocked or non-visual blocked on the stable or the unstable surfaces. Also, this study intended to assess balance ability more objectively and in a more diversified ways by using Biorescue. Methods : This study randomly assigned all the subjects to 4 groups; visual blocked or non-visual blocked on the stable surface or the unstable surface. Subjects were given 3 sets of squat exercises per day, 3 times a week for 3 weeks. At the beginning and the end of the exercise for 3 weeks, subjects measured balance ability using Biorescue and Lower Quarter Y-balance Test to evaluate the improvements of before and after. Results : All the groups showed the differences in the balance ability on the Biorescue and The Lower Quarter Y-balance test before and after the exercise. Among these groups, a group with condition of visual blocked on the stable surface showed the highest improvements. And also, it showed significant differences compared to other groups (P>0.05). Conclusion: Using squat combined with variables according to this study, it can be utilized for rehabilitation of the aged and preparation of healthier life.
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