The 80/20 Principle is backed by science and research and practiced by most elite endurance athletes…so why do so many runners have a hard time following it?

Starting your training from a position of readiness rather than playing catch-up is non-negotiable for marathon success. Before diving into marathon-specific training, you need a solid foundation that can carry you through 15+ weeks of progressive training. This includes base fitness, physical preparedness, proper habits and routines, and mental resilience.

The introduction to a new Fall marathon training series