What kind of flat feet do I have and how can I make them flexible

Flat feet: Symptoms, exercises, diagnosis, and treatment

Flexible Flatfeet - FootEducation

I have really flat feet. I frequently get shin splints. Is my lack of a foot arch the cause? - Quora

Do flat footed people really have a disadvantage in running? Is it in general or only for fast running or long running? Do they have any advantages? - Quora

How to fix flat feet without surgery - Quora

Flexible Flatfeet - FootEducation

Characteristics of a Flat Foot - FootEducation

Flat feet - NHS

What kind of sandals can a flat footed person wear? - Quora

Flat Feet: Symptoms, Causes, Diagnosis, and Treatment

I have flat feet. How can I fix it or help it? - Quora