triathlon people own the whole lot of them :P
An Ironman Triathlon is one of a series of long-distance triathlon races organised by the World Triathlon Corporation (WTC) consisting of a 2.4 miles (3.86 km) swim, a 112 miles (180.25 km) bike and a marathon (26 miles 385 yards, 42.195 km) run, raced in that order and without a break.
these guys should be the fittest... dont see f1 driver or footballer doing that