Stop running your easy days too hard and your hard days too easy. Designed specifically for intermediate runners looking to improve their 50K time significantly, this 26-week plan introduces a critical 5th day of running impact to build structural resilience and expand VO2 Max-specific pacing. Built on the proven 80/20 Endurance methodology, you will develop the specific muscular endurance, time-on-feet, and lactate clearance needed to conquer 31 miles with confidence. What It Delivers: ...