What does “20” on the weekly schedule (during the week) mean? Are we running 20 miles?

During the week, we run for minutes. So if the schedule says “30” on a Tuesday, you should run or walk 30 minutes. Do this at a comfortable pace unless instructed to do otherwise. On the weekends, we do miles, so the schedule will say four miles. Listen to your coaches for guidance on running these miles each week.