BMX

The BMX is the sport of riding a bike like a motocross, BMX is the acronim of bicycle motrocross.
The BMX started in the 1970s in Southern California nowadays there are 2 types of BMX competition, freestyle and race.
In a race competition the riders have to avoid some obstacles and the winner is the rider who gets first to the end.
In the freestyle competition the rider has to jump over the ramps and do some tricks, in this type of BMX the winner is selected by some judges.

This picture is of a BMX race competition
The video below is an example of BMX freesyle demostration