Some continuous 'tempo' running. I do agree that whilst I think it can be effective, too much of it is an injury and over-training risk - there has been evidence of that from various forumites since I've been on RW.
I'll concede that the complete eradication of pace in this area may be a mistake, however, unless a youngster in their 20's, I'd be a bit careful about running miles and miles back to back like this. Maybe 5 minutes at a time with a couple of jogged miles between.
Mr V. You've discovered the most extreme form of one size doesn't fit all.
It's astonishing how many runners assume that the fastest runners are also the most knowledgable. It's a joke how many champion runners are give the stage to promote their stuff; as if it was somehow special, when the main reason they were successful was genetic luck and physical gambling. i.e they over did things but got away with it long enough to get a result.
The only runner I ever train with, once ran in the Olympics. They look back now and say the training they did was quite often counter productive, that they now do things differently.
Today and yesterday we ran 10 miles at 8:01 average pace (I kid you not, the same pace) and chatted the whole way. Fast enough for an Olympian 5000m runner.