When a child with flexible flatfoot stands, the arch of the foot disappears. Upon sitting or when the child is on tiptoes, the arch reappears. Flexible flatfoot is usually painless and does not interfere with walking or participation in sports.
Pes Planus or Flatfoot – KevinRoot Medical
Pies planos, ¿qué son y cómo se tratan? - Mejor con Salud
Flat Feet Exercises: Treating Flat or Fallen Arches
Pés planos, o que são e como tratá-los? - Melhor com Saúde
OrthoKids - Flexible Flat Feet
Flat Feet and Fallen Arches in Infants and Children
Overpronation: Causes, treatment, and exercises
Flexible Flatfoot Boston Children's Hospital
Foot and Ankle Patient Education
Pediatric Flatfoot - Hersco Edu Center