IRONMAN 226 Pacing Masterclass: Variability Index, EF & Marathon Conservation

Sub-10 hour IRONMAN racing hinges upon disciplined energetic conservation.

Capping bike output at 68-72% FTP with a Variability Index (VI) below 1.05 spares glycogen stores, ensuring sustainable 42.2km running splits.

Section III, IV & V: Steep Climbing Power Caps and Sub-9:15 Kona Qualifier Case Study

Capping climbing surges at 85% FTP with 34T climbing cassettes preserved running legs for a 3:18 marathon split.

Section VI & VII: Cardiac Drift Management and Philosophical Endurance Mastery

Restricting cardiac drift to <8% through hydration preserves cardiovascular efficiency across 180km.

Section VIII: The 4-Stage 226km Mental Architecture

Mental segmentation transforms the daunting 226km journey into disciplined, autonomous milestones of endurance triumph.

Section IX & X: Pre-Race 3-Day Carb Supercompensation and Finish Line Glory

Loading 10g/kg carbohydrates and capping bike variability ensures crossing the finish line as an IRONMAN.