Imagine having a body without any physical endurance limits. Well, if you are Dean Karnazes, you don't have to imagine it: His body flushes away lactic acid and his muscles just keep running without fatigue. Some of the highlights of his impressive career include running continuously for more than 3 days without rest over a 350 mile distance. He has also completed marathons in the death valley (120°F degree heat) and the South Pole (-40°F conditions). He ran 50 marathons, in 50 states over 50 consecutive days to raise money for charity, showing that he has chosen to utilize his superpowers for good.
More information:
odditycentral.com/news/rare-genetic-condition-allows-53-year-old-to-run-350-miles-without-stopping