The top selling footwear categories include training, running, basketball, sports-inspired casual shoes, kids shoes.

FORBES: What Chuck Taylor Adds To Air Jordan

In the U.S., athletes are not allowed to go pro until they have been out of high school for three years ( except in basketball the number is one), so college sports is the only way for physically gifted kids to earn money from sports.

FORBES: Turtle for Thanksgiving : College Football Econ.