BMX stands for Bicycle motocross and is a form of off road racing on a closed track with up to eight riders.
The format of BMX was derived from motocross racing. BMX bicycle races are sprint races on purpose-built off-road single-lap race tracks. The track usually consists of a starting gate for up to eight racers, a dirt course made of various jumps and rollers and a finish line. The course is usually around 400m long and has large banked corners that help the riders maintain speed. The sport of BMX racing is governed in the UK by British Cycling. The sport is very family oriented and largely participant-driven, with riders ranging in age from 2 to 70, and over. Professional ranks exist for both men and women, where the age ranges from 18 to 40 years old.