The 2015 Ironman World Championship, honoring the best male and female athletes in three disciplines (swimming, biking, running), took place Saturday in Hawaii with Jan Frodeno and Daniela Ryf coming out as the big winners.br Germany's Sebastian Kienle and Australia's Mirinda Carfrae were under the microscope as the defending Ironman champions.br br Unfortunately for Carfrae, her day ended prematurely, as she tweeted about an injury that forced her to withdraw during the bike stage:br That opened things up on the women's side, with Ryf taking full advantage of the opportunity. The 28-year-old was the runner-up in this event last year but has won the last two Ironman 70.3 World Championships. br br Per the Ironman Triathlon on Twitter, Ryf was aware of how much a victory would mean:br Ryf opened things up during the bike session, taking a three-minute lead over Jodie Swallow with just over 20 miles to go before heading into the marathon. She wound up coasting to a 13-minute margin of victory.br br Not surprisingly, per the Ironman Triathlon, Ryf was the first female to start the 26.2-mile trek:br The marathon was set to be the most difficult part of the race, not just because it's the final phase. Per the Ironman Triathlon, temperatures on the course were at 90 degrees in the air and close to 120 degrees on the asphalt.