The arch is perhaps the most important structural feature of our feet, which bear 200,000 to 300,000 lbs. of stress each mile we walk. Arches absorb the brunt of the pressure our bodies thrust upon our feet with each stride. Arch height may vary significantly from person to person. It may also change as a person ages, or as the result of various medical conditions. Properly supporting the arch can prevent a variety of musculoskeletal problems that can lead to inactivity and even disability.