Using double blind, randomized controlled design to study the short-term therapeutic effects of customized arch-support shoe insoles to children with flat foot.

A total of 52 children with flat foot will be collected. The participants will be randomized into two groups, including study group (insoles group) and control group (without insole group).

All participants in the insoles group will be evaluated at baseline, that is before the customized full-length shoe insoles are prescribed. All the evaluations, including physical functional ability, balance, physical activity, functional performance, and quality of life will be re-evaluated up to 12 weeks after shoe insoles wearing in the insoles group.

The control group will be evaluated at the baseline and up to 12 weeks.

Inclusion Criteria:

• flat foot

Exclusion Criteria:

• age less than 3 years old or older than 10 years old
• pathological flat foot