text: Toughest athlete is female and unknown You probably haven't heard about one of the toughest endurance sports around: the deca-ironman. That's 38 km swimming, immediately followed by an 1800 km bicycle ride and a 420 km run. Currently, the world record stands at about 187 hours, held by a German housewife. Nobody else has ever finished the course below 192 hours.  
inputs: Toughest athlete is female and unknown You probably haven't heard about one of the toughest endurance sports around: the deca-ironman. That's 38 km swimming, immediately followed by an 1800 km bicycle ride and a 420 km run. Currently, the world record stands at about 187 hours, held by a German housewife. Nobody else has ever finished the course below 192 hours.  