写一篇关于极限运动的英语文章(至少写两段）.

Parkour is a sport activity with the purpose of moving from one place to another as efficiently and quickly as possible,using only the physical skills of the human body.It is used to overcome obstacles,which can be any obstacle in the environment on fences and stone,to pillars,walls and bars and can be practiced both in urban areas and rural areas.
Founded by David Belle in France,parkour focuses on efficient movements to develop the training of the body and mind,to be prepared to overcome obstacles in an emergency.Can also be a form of entertainment or a way to spend your free time.This sport is also called l’art du deplacement / the art of movement / art movement or even free-running.The term “parkour” is derived from the French “parcours go combattant” in translation meaning “to overcome an obstacle” .
Free running is the term used by Sebastien Foucan in Jump London documentary to refer to parkour,term which later came to describe a sport based on acrobatics,different from the original discipline Le Parkour.
Practitioners of this discipline are called tracers .The sport is practiced mainly in urban areas,involving jumps in,on,through and around obstacles such as railings,stairs,pillars,,trees,buildings,etc..They consider this kind of training a way of liberation from the constraints imposed by other sports and one standard for overcoming the induced limitations .
Parkour is classified as “wow!” an extreme sports.Practicing this discipline does not require wearing special equipment,sites developed,prepared before or other obstacles.Parkour is very simple,fluid movement from one place to another,to which are added run speed,climbing,jumping,spectacular and efficient movement,imagination,improvisation and other complex techniques.If sport “parkour” performed by you does not include items listed above,then you are doing fitness.