The characteristic of arch height and influence of dynamic balance by intervention of exercise in flatfoot. - The characteristic of arch height and influence by intervention of exercise in flatfoot.

The relationship between arch height index and age is increasing before age of 40, and starts to decline from age of 40, and the relationship between arch height index and BMI is declined in excess weight. The arch height index in male was higher than in females. The trail of COP in the ML direction of flatfoot was narrower than that of neutral foot.The intervention of SFE for four weeks could effectively improve the arch height and maintain the height for at least three weeks.