High Quality Content by WIKIPEDIA articles! The USA Indoor Track and Field Championships is an annual indoor track and field competition organized by USA Track & Field, which serves as the American national championships for the sport. In years which feature a World Indoor Championships in Athletics, the championships serve as a way of selecting the best athletes for those competitions. Track and field athletics is a collection of sports events that involve running, throwing, jumping and walking. Organized athletics are traced back to the Ancient Olympic Games from 776 BC, and most modern events are conducted by the member federations of the International Association of Athletics Federations. The athletics meeting forms the backbone of the modern Summer Olympics, and other leading international meetings include the IAAF World Championships and World Indoor Championships.