After 6 months, if you haven't responded that's obviously the top end and it's worth reassement of what is going on But it took me 5 months and for real, I nearly quit this method.
I felt better or fresher quite quickly, but there were no results. Looking back, I was in a really, really deep hole from my previous training. Shedding the fatigue and then generating load I could actually catch up with took about 19 weeks, in the end. My assumption is that what happened anyway. It's really thr most logical thing in retrospect.
Like so many people have reported, just suddenly one day I was faster. It's hard to explain, but it's clearly something that happens as a lot of people have reported this. Most are saying the same sort of feeling happens maybe after 8-10 weeks, so it was quite a lot longer in my case. A few people posted around a year ago about this, if they hasn't I probably would have bailed.
I went from 18:12, to 17:37 in two weeks, from week 17 to 19. That was a lifetime pb but absolutely no sign of it until it just happened. I would, genuinely love someone to explain it.
Fast forward quite a bit more time, I've used the marathon build to run 2:41, ran 16:49 5k and ran a 4:54 mile. So to say I'm glad I stuck with it, is an understatement! Vanilla is all I do, it can be a touch boring, but I've learned to embrace that and the performances are just so much drastically better, it's worth every second of it. I feel like I'm one of the ones who wants to fiddle with it and try and make it better, so it's hard not to. But I probably accept I'm going to make the balance worse, especially when I am still improving.
The book itself, doesn't tell you not go do anything else, but use the knowledge you have gained to ask you why or what you want to achieve when you do so. To date, I haven't justified any changes to myself in an a acceptable way and anyway, itm still improving.
Two more books on the way for others as Christmas running gifts. Seeing it's ranking on Amazon still is impressive.