Listen to the Summary of Andrew Kastor's Running Your First Marathon in 20 minutes. Please note: This is a summary & not the original book. The foot is a very important part of your body, as it helps you walk and run. It is made up of 26 bones, held together by ligaments, fascia, retinaculum, and skin. There is no type of foot that is best for marathon running, but there are several characteristics of a foot that can affect how you run, such as arch height, toe-spread ability, and pronation...