So I've started the plan and just want to make sure I understand the suggested paces they use. For instance, tomorrow's run specifies a 10 minute warm up, followed by a threshold pace run, then followed by a recovery pace run, and finally a cool down run.
My question is what are these paces? Are they really just my heartrate zones (warm up = Z1, easy = Z2, threshold = Z4)? If so, what should I use for recovery pace (Z2? Z3?) and cool down (probably Z1?)
At any rate, just not sure how fast I should be trying to go during the different phases of the run.
Any help much appreciated!
J