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National Geographic Documentary | XviD | 1:31':27'' | 700 MB

It strikes four times faster than a snake. It kicks with more than 1,000 pounds (453.59 kg) of force. And it can rival the impact of a 35 mph (56.33 kph) car crash. It's the most complex weapon ever designed—the human body. National Geographic Channel brings together a team of experts and a cross section of champion martial arts masters to analyze the world's greatest fighting techniques and find out which discipline has the hardest hits, the fastest moves, and even the deadliest weapons...

For the first time, "Fight Science" brings together members of the crash-test industry, the sports biomechanics industry, and the Hollywood animation industry—applying their combined expertise and technology to a diverse range of martial arts techniques, including karate, kung fu, jiu jitsu, tae kwon do, muay Thai, and wushu, among others. The results reveal the comparative strengths, advantages, and limitations of the various martial arts styles. And in a breakthrough combination of technologies, scientists are able to peer inside a fighter's body in real time.

"Fight Science" tests and films world-renowned martial artists, hand-picked to represent various disciplines, in a custom-built combination dojo, high-tech lab, and film studio that took over a year to design and build. Are the legends true? Is there such a thing as a death punch? How much force does each fighter exert? With 32 infrared motion capture cameras, three high-definition cameras, and three ultra-high-speed cameras, the studio allows the crash test and biomechanics scientists to measure and map the speed, force, range, and impact of muscles and bones in the fighters' bodies.

The motion-capture technique, requiring reflective markers over the fighters' entire bodies, allows for sophisticated real-time three-dimensional models. These results are combined with other data to create separate sophisticated animations of the fighters' bones, muscles, and nerves. "Fight Science" juxtaposes the fighters' movements with their animated selves for unprecedented insight into exactly how the body generates each move.

Over the centuries, martial arts fighters have supplemented their techniques with instruments like staffs, swords, and nunchuk developed to magnify death-dealing potential. "Fight Science" also explores how the designs and techniques of weaponry can exponentially increase an already fearsome fighter's impact, control, and range.

1. "Fight Science" brings together ballistics, biomechanics, and crash-test technology for the first time ever.

2. Engineers measure and map the speed, force, and range of nerves, muscles, bones, and weapons.

3. Data is collected at 20,000 samples per second.

4. The motion-capture technique requires reflective markers over the fighters' bodies, allowing for sophisticated animation of bones, muscles, and nerves.

5. Filming took place in a custom-built dojo—equipped with 32 infrared motion-capture cameras, three high-definition cameras, and three high-speed cameras.

6. The technology allows scientists to peer inside a fighter's body as he moves in real time.

7. Special sensors—used in NASA spacesuits, sports science, and the crash-test industry—take data from inside the fighters' shoes to see how some are able to maintain catlike balance no matter what the obstacle.

8. Measurements indicate that a kung fu punch travels 40 feet (12.19 meters) per second, four times faster than a cobra strike.

9. Data indicates tae kwon do fighters react in only 0.18 seconds-nearly twice as fast as the blink of a human eye.

10. The human body has 206 bones, more than 600 muscles, and miles of nerves.

11. The foot and ankle contain 26 bones, 33 joints, and more than 1,000 muscles, tendons, and ligaments.

12. Motion-capture shows that the punch starts not in the fists, but in the feet.

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