Rare Genetic Condition Allows 53-Year-Old to Run 350 Miles without Stopping

Most athletes would agree that lactic acid build-up in the muscles is the bane of all long-distance runners – but not American jogger Dean Karnazes. 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. The extreme […]