Stop running your easy days too hard and your hard days too easy. The 50-Mile distance requires a massive shift in training philosophy. Success is no longer determined strictly by your VO2 Max, but by your Physiological Durability and Gastrointestinal Trainability. Designed specifically for advanced runners stepping up to 50 miles or looking to improve their time, this 26-week plan introduces high-frequency training with dual-intensity days. By adding a secondary moderate-intensity threshold ...