Barefoot running injuries (notably repetitive stress injuries) caused by heel striking in padded running shoes. The barefoot movement has prompted some manufacturers to introduce thin-soled and flexible shoes such as traditional moccasins and huaraches for minimalist running. Throughout most of human history, running was performed while barefoot or in thin-soled shoes such as moccasins. This practice continues today in Kenya and among the Tarahumara people of northern Mexico. Historians believe that the runners of Ancient Greece ran barefoot. According to legend, Pheidippides, the first marathoner, ran from Athens to Sparta in less than 36 hours. After the Battle of Marathon, it is
Ancient Greek phonology alphabet were used for the regional dialects of the Greek language during the Archaic and early Classical periods. The Attic dialect, however, used two forms. The first was the Old Attic alphabet, and the second is the Ionic alphabet, introduced to Athens around the end of the 5th century BC during the archonship of Eucleides. The last is the standard alphabet in modern editions of Ancient Greek texts, and the one used for Classical Attic, standard Koine, and Medieval Greek, finally developing into the alphabet used for Modern Greek. Most double consonants are written using double letters: represent or .