Runner's high
Last night I went to meet one of the most amazing and influential runners in America today. Dean Karnazes is an extreme ultramarathoner who's run 262 miles straight (that's 10 marathons in a row) and won some of the most prestigious races in the country, including Death Valley's Badwater and The Western States. Amazingly, for all his exposure on "Late Nite with David Letterman," "60 Minutes" and other television programs, the guy's still humble about his accomplishments. During the book signing for his Ultramarathon Man: Confessions of an All-Night Runner , Karnazes talked to each of us individually and convinced me to aim higher. Just how different is this guy? In addition to having been genetically encoded to run those distances without ever suffering an injury, he needs only four hours of sleep daily. He cross trains by surfing and rock climbing. He carries a cell phone and credit card and orders ahead for pizzas to eat while on his long runs. H