
Flexible flat foot refers to a condition where the medial longitudinal arch is present in non-weight bearing postures.

There are two types of pediatric flat foot. Recent research suggests that 3-6 years old is a critical time for medial longitudinal arch development given that only 26% of children have flat feet by the time they are 6 years old.

~97% of 2 year olds have a classification of flat feet and this presentation should resolve by the time a child is 10 years old (incidence as low as 4%). Pediatric flat feet is a NORMAL part of the development of the structure of a child’s foot. Or bilateral pes planus (if you want the medical lingo) is a common pediatric condition where a child’s feet demonstrate minimal medial longitudinal arch development when they are in a weight bearing posture (i.e.
