These are my two favourite motor-sports. Formula 1 is the most technologically advanced open wheeler motor racing competition in the world. The drivers need to be courageous, very fit, and extremely skillful. The races last between an hour and a half and two hours. The high speed of the cars and high levels of grip when cornering, braking and accelerating means drivers experience G forces up to 3 times their body weight. Imagine doing that for an hour and a half with only two, or three, eight second breaks during pit stops.

For more information on F1 check out
F1.com Understanding The Sport.
BBC F1.
F1.com Glossary.

Indoor Trials is my favourite two wheeler motor-sport and although the riders don't reach speeds over 300 kilometres an hour like F1 drivers do it is still a high skill, high adrenaline sport. Riders have to negotiate extraordinary obstacles without putting their feet on the ground and yes it is a race against their competitors and against the clock.

For more information check out
http://www.indoortrial.com/.