20-Week IRONMAN Training Plan for First Timers: From Base to Finish Line
Plan Overview This 20-week plan takes a first-time IRONMAN athlete from a solid fitness base to the start line of a full-distance triathlon (3.8km swim, 180km bike, 42.2km run). It builds progressively through four distinct phases, peaking at approximately 14-16 training hours per week before a structured two-week taper. By the end of week 20,…