In junior high school, Karnazes met Jack McTavish, a track coach who became Karnazes' mentor and introduced him to the appeal of long-distance running. McTavish's basic running instructions were …

(Worldkings) 53-year-old Dean Karnazes has a genetic condition that means that he doesn't get cramps, muscle burn or hyperventilating when he runs. He even managed to sprint 350 miles in 80 hours and …

May 18, 2016 · The 53-year-old has a rare genetic condition that rapidly flushes lactic acid from his system, allowing him to run indefinitely without ever experiencing a cramp or a seized muscle.

Sep 21, 2025 · In summary, there is no single "condition" that defines Dean Karnazes. Instead, it is a confluence of rare physiological traits, likely genetic, that give him a remarkable advantage in …

May 13, 2016 · The 53-year-old has a rare condition which allows his body to rapidly flush lactic acid from his system - before it builds up in his muscles

May 12, 2016 · Meet Dean Karnazes, a man who can run 350 miles without stopping. The 53-year-old distance runner has no trouble running a marathon. In fact, he can do them back-to-back while …

Dean Karnazes has an incredible and rare condition which means he never gets cramps or muscle burn. And this is a man who has taken on some of the toughest endurance runs in the world. He's run a …

Dean Karnazes has a rare genetic condition that enables him to run continuously for days at a time. The 53-year-old athlete is certainly no stranger to endurance running having competed in some of the …

Mar 19, 2017 · There’s a bizarre condition that allows a human to run 350 miles without stopping. 53-year-old Dean Karnazes is being hailed as the “Real Life Flash” for his rare genetic condition that …

He’s run across the Sahara Desert in 120-degree temperatures, and he’s run a marathon to the South Pole in negative 40 degrees. On ten different occasions he’s run a 200-mile relay race solo, racing …