If your goal is to develop the speed component of your running fitness quickly and safely, this is your training plan. The 7-week Level 3 80/20 Run Faster plan will boost your sustainable speed without overtaxing you or neglecting other fitness components. Featuring the proven 80/20 intensity balance described in Matt Fitzgerald's bestselling book 80/20 Running. TARGET ATHLETE This level is intended for advanced competitive runners who are motivated to realize 100 percent of their speed ...