The 6-Day training program is built for serious runners who schedule one day off per week. You reap the same fitness and performance benefits of a 7-Day program—just with a slightly higher daily volume of training. Your program prepares you to race distances from 5K to the half marathon, and it includes separate taper schedules so that you can race at any point in your 12-week calendar—then simply return to your program exactly where you left off.