Physiology of marathons certain physiological characteristics of marathon runners exist. The differing efficiency of certain physiological features in marathon runners evidence the variety of finishing times among elite marathon runners that share similarities in many physiological characteristics. Aside from large aerobic capacities and other biochemical mechanisms, external factors such as the environment and proper nourishment of a marathon runner can further the insight as to why marathon performance is variable despite ideal physiological characteristics obtained by a runner. The first marathon ever run was an unintentional 25 mile trek performed by Pheidippides. Pheidippides was a Greek soldier who ran to Athens from the
Battle of Marathon of events, with the competitors running from Marathon to Athens. So popular was this event that it quickly caught on, becoming a fixture at the Olympic games, with major cities staging their own annual events. The distance eventually became fixed at 26 miles 385 yards, or 42.195 km, though for the first years it was variable, being around —the approximate distance from Marathon to Athens. Battle of Marathon The Battle of Marathon (Greek: , "Machē tou Marathōnos") took place in 490 BC, during the first Persian invasion of Greece. It was fought between the citizens of Athens, aided by Plataea,