"Special operations are elite military units trained for unconventional warfare, often to execute dangerous, covert missions behind enemy lines. The soldiers must excel beyond normal human capabilities, displaying superior physiology and extraordinary mental ability. This is evident in the strength and stamina of U.S. Navy SEALs, the speed and focus of U.S. Green Berets and the lightning reflexes of Israeli Commandos. Unlike athletes, who prepare for a scheduled competition under controlled conditions, these elite soldiers must excel in ruthless situations that can become deadly without warning. Now these warrior athletes are put to the test by science and cutting-edge technologies to exhibit their maximum capabilities under the most adverse circumstances."
http://channel.nationalgeographic.com/channel/fightscience/videos_2.html