Surely the times can be adjusted for different levels of runner. It appears from what I’ve read that Baylor runners train at percentages of their target maximum. Anyone can do that by adjusting the times to suit them.
My only question is, with that much “intermediate” work in the 70-85% range, how do his runners maintain their speed? I think the orthodox answer is that running in that range will shift muscle fibers, and perhaps “teach” the nervous system to run at slower speeds. Yet clearly Hart has no problem harnessing speed in his athletes.
Any thoughts?