Is There a Threshold Ofvasee?

There's no squeezing the strength of conditioning into that 20 %? No, well, not unless you do it. You need to be reasonable if you are going to follow this kind ofvated 20 principle. The key is more specific toward your goal pace as you get closer to your race. Fundamentally use one 80-minute session a week for running and three short interval sessions in preparation for marathons or marathons.