Groundwork (10 to 20 miles per week) (8 weeks)

Build the foundation that everything else is built on. This 8-week program will safely progress you from running 10 miles/week to 20 miles/week.
Groundwork is your base-building phase, designed to develop aerobic fitness, durability, and consistency so you can handle more volume and higher intensity later on. This is where you lay the groundwork (literally) for long-term progress - so when it’s time to train faster, your body is ready for it.