Vinny Mauri, an Ohio runner, lets friends pick his workouts by number. He sends options to training partners or Instagram followers, asking them to choose a number.

On a significant day, Mauri completed 45 miles, including 25 miles before warm-up. He ran two long treadmill reps, one lasting 40 minutes, extending it to 50 minutes. Read more everyday miles coverage.

Mauri's afternoon included four 20-minute sessions with short rests. He finished with a 20-mile session, totaling 45 miles for the day at an average pace of 4:56 per mile. Related: Ladder Workouts to Enhance 10K Training.

This original Runner World brief is based on reporting from Marathon Handbook. Visit the source for its complete reporting, context and any later corrections.