A Guide to Sub 12-Hour Ironman Splits

The Ironman triathlon is a grueling test of endurance, consisting of a 2.4-mile (3.86 km) swim, a 112-mile (180.25 km) bike ride, and a full marathon 26.2-mile (42.20 km) run. Completing an Ironman in under 12 hours is a remarkable achievement that requires careful planning,...