Why did my arches fall?
Arches don’t fall. Increasing hypermobility of the forefoot results in compensation (pronation) of the midfoot (the arch) in order to keep the ball of the foot on the ground. The changes in the arch are the secondary changes, the increasing hypermobility and displacement of the forefoot are the primary changes.
Dr Steven D. Stark - Podiatry, Orthotics, Sports Medicine - Vancouver, White Rock