One of the most common errors that athletes make (in any sport) is doing all of their work in that moderate zone. It’s not hard but it’s not really easy either. As a coach, we want you to learn to mix up your paces and not always go out at that default moderate pace which feels normal to you.  So we’ve emphasized easy pace as the best way to build general aerobic endurance which you need for a distance running event like the half marathon. 
 
Tempo running is a great way to boost your fitness. What is a tempo run? How does this work and how do you do these workouts?