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
Porto Half Marathon Porto Half Marathon The Porto Half Marathon (Portuguese: "Meia-Maratona do Porto") is an annual half marathon road running event held in Porto, Portugal which follows the River Douro. Known as the Sportzone Half Marathon for sponsorship reasons, the inaugural edition was held in 2007 and it typically takes place every mid-September. The competition attracts top level elite athletes, mainly East African and Portuguese. Since its inception, all the men's and women's races have been won by East African competitors. Among those to top the men's podium are Olympic champions Haile Gebrselassie and Samuel Wanjiru, while former world champion over 10,000