Stop running your easy days too hard and your hard days too easy. Tackling 26.2 miles requires safely building your aerobic engine without injury. Designed specifically for beginners taking on the full marathon, this 24-week plan uses the proven 80/20 Endurance methodology. You will run 4 days a week, with 1 day of cross-training, keeping the vast majority of miles purely aerobic (Zone 2) to safely build time on feet. To elevate fitness, you'll dedicate just one day a week to high-quality ...