Though humans have practiced martial arts for thousands of years, many scientists believe that fighting for recreation, without the intent to hurt, began with chimpanzees, far before humans made it into a sport. Today, martial arts are popular all over the world, with organized competitions and a multitude of differing styles. Be it Korean taekwondo or Brazilian jiu-jitsu, martial arts have become a staple of sports culture. Learn about the history of martial arts, from their pre-human beginnings to today's Olympic-level competition. Explore the most common injuries that martial artists sustain, including treatments and prevention strategies. In addition, find out about: • How martial artists maintain their health and fitness. • How stretching before athletic activity can prevent injury. • What kinds of training martial artists must undergo in order to be competitive. • The importance of good nutrition. • The dangers of performance-enhancing drugs.