DUBLIN, IRELAND - AUGUST 9:  Competitors take part in the swim section during the Ironman triathlon event on August 9, 2015 in Dublin, Ireland. More than 2,500 athletes swim, cycle and run through Dublin city and county on as part of the Ironman 70.3 triathlon. The course involves a 1.9km swim at Scotsman√Ęs Bay in Dun Laoghaire, followed by a 90km cycle which goes through Dublin city centre with the race concluding at Phoenix Park with a 21km half marathon.  (Photo by Charles McQuillan/Getty Images)