Stop running your easy days too hard and your hard days too easy. Designed specifically for novice runners or those looking to safely step up their volume, this 20-week plan trades two complete rest days for low-impact cross-training. This expands your aerobic base and fat-burning engine without the pounding of extra running miles. Built on the proven 80/20 Endurance methodology, you will develop the specific muscular endurance and lactate clearance needed to conquer 13.1 miles with ...