Going from 70.3 to 140.6 is not just double - it feels like triple. When I trained for Iron 105, I made the mistake of doing a solo half and finishing thinking, I feel amazing, I could totally do that again. That gave me a false sense of security. Here is the truth: The second half of an Ironman hits different. Fatigue stacks, glycogen drops, motivation wavers, and the wheels can come off fast. The back half is where you earn it. The back half is where you become an Ironman. So if you are steppi