Discussion: what system are those zones...

what system are those zones? I think you mentioned it but forgot. they donj't look like JD . . .

Matt Fitzgerald 80/20 running.

Reading JD now. Not sure that MF and JD are that far apart conceptually, just terminology.

OK, I've read some of his stuff, the Race Weight book, for example. agree, I mean, they are all describing the same human physiology for purpose of specific training sessions.

Now that I'm getting into the JD book, their philosophies seem to diverge in some basic areas. JD recommends back to back HI workouts where MF does not so much. But they both emphasize the importance of recovery time. MF does 3 week cycles built into longer phases, JD recommends more of a consistent effort throughout his training periods.

Thankfully, JD's book doesn't have 6 chapters of preamble to plow through.

Actually, if you read JD's schedules carefully, they are basically 3-week micro cycles. Pfitzinger also seems to like that duration. Yasso expounds a 10-day "week", but, again, if you read it carefully, it amounts to a 3-week cycle with an off day. This seems to be something that the top coaches are converging on.

Back-back (or "couplets" in the current vernacular) are a very good thing. I've actually been doing them for about 35 years. Seems this is one of the few areas where cyclists are ahead of the times.

I'm going to try couplets once I feEl comfortable with my base. Not far enough into JD book to pick up on the 3 week cycle. But I did notice the 7 day schedule with no rest day.