Objective
To find out the changes of the plantar pressure distribution of foot and the pathway of center of pressure (COP) in normal preschool children with age.

Method
Thirty-eight normal children aged 1 to 6 were participated in this study. We divided into three groups according to the age. Foot contact area, pressure of the foot and pathway of COP were measured using F-scan in-shoe measuring system (Tekscan Inc.) during the gait.

Results
The ratio of midfoot contact width to forefoot contact width was decreased with age (p＜0.05). And the relative pressure of the medial midfoot was decreased with age (p＜0.05). In the analysis of COP, the ratio of anteroposterior length of COP to total contact length was significantly increased (p＜0.05), and the ratio of mediolateral width of COP to forefoot contact width was tend to decrease.

Conclusion
We can identify the characteristics and changes of the foot pressure distribution and the pathway of COP in preschool children with normal foot using F-scan system. These quantitative data of foot scan are useful for evaluating the foot pathology in preschool children during the gait.