British media reported that Nike's Vapor Fly series, which has swept the land-based long-distance world, will be banned by a new World Federation rules. The Daily Telegraph [electronic version] has been reviewed by a panel of World Federation experts and has reportedly set rules to limit bottom thickness. Models that are currently gaining popularity are forbidden to use at the top level.
The shoes feature a resilient carbon fiber plate sandwiched between thick soles. A number of top athletes, including Eliud Kipchoge, a boy with marathon world records, Brigitte Kosgay, a girl [both in Kenya] and Nike, a Japanese record holder. Over 80% of athletes wore this year's Hakone Ekiden, which was a record high-speed race.