You have finished a half marathon. This plan is about running a faster one. Twelve weeks, 5 running days, and two quality sessions a week from the first one. Tuesday is threshold work in its various forms, from cruise intervals to a continuous threshold run. Thursday is a progression run that teaches you to lift your effort when you are already tired, which is exactly what the last 3 miles of a half asks for. Wednesday, Saturday and Sunday are easy, and they need to stay that way for the other ...