Long slow distance vs high intensity: what is the right balance to have in your running program?

Many runners do all or most of their training at one pace. Ideally a well structured program should have a good balance between long, slower running and some high intensity running. If you're not on one of our CoachParry.com training programs (where this is already sorted for you) and need some guidance on this topic then listen to the advice Coach Parry shares on how to balance this in your training program.