Motocross racers must be extremely fit. The sport is very demanding on the arms, legs, shoulders, and glutes. The rider has to be able to keep control of his machine on a course that most people would have difficulty walking across.
If racing cross-country through a mix of both open and tight Mallee Bush tracks appeals to you, then you should consider Enduro riding. It’s a case of rider and bike verses the elements of the natural terrain.
Dirt Track is one the most exciting and also a good way to be introduced to racing, it does not require a new bike, the latest gear or an intensive training regime, a rider of average fitness can easily handle the 4 lap sprints.