There are four variations on reduced-numbers Kitted American Football:
Arena Football is the main one – 8-a-side Indoor Football played on converted Ice Hockey Rinks – the field is 50 yards long with two 10 yards endzones and teams have 5 downs (attempts) to reach the endzone or the ball is turned over as opposed to the standard 11-a-side American Football which is played on 100-yard fields with two 15-yard endzones, and where teams have 4 Downs in which to reach 10 yards or the ball is turned over.
6-Man Football is popular in Texas.
8–a-side Football is played in smaller localities in USA as well as around the World.
9-a-side Football is very similar to 8-a-side and is played throughout USA and the World.