2.4 mile swim. 112 mile cycle. 26.2 mile run. The athletes look more like spiders as we are shown a video of Sian Welch and Wendy Ingraham crawling across the finishing line of the 1997 Ironman Triathlon. The women push themselves past exhaustion to the point where their legs will no longer carry them. Their mental strength and determination lumps them over the line where they collapse, limbs twisted.