This program takes you through three 5 week blocks: Block 1 is for maximizing aerobic metabolism through lactate threshold training and fartlek/leg speed runs Block 2 aims to maximize leg speed work through hill repeats and continue to build on lactate threshold training. Block Three is about maximizing time spent at the goal half marathon pace to get comfortable at that intensity, and maintaining leg speed work. Plan calls for 5 runs a week, with the long workout on Tuesdays, supporting ...