分类： Windows平台
2013-09-21 10:48:25
is a shoe that allows the muscles in the foot to gain strength by providing less constriction, runners are advised to gradually break into the shoe rather than immediately running long distances as to prevent muscle cramps and other discomforts.
It was introduced in 2004 after Nike representatives observed Nike sponsored track athletes training barefoot. The numbering system indicates the cushioning of the and follows a scale ranging from 0 (barefoot) to 10 (normal running shoe), i.e. being the least and Free 7.0 being the most cushioned model so far.
